M/s
A BDSM abbreviation for master and slave.
Machlaenomania
Masochism in women.
Macromastic
Pertaining to large breasts.
Macrophallia
The condition of having a large penis.

Madame

Proprietress of an agency.
Maha
Tantric sex term for the almighty one.
Maiesiophilia
Arousal from childbirth or pregnant women.
Maithuna
Tantric sex term for a ritual, which culminates in a sexual union between two people.
Maniaphilia
An attraction to insane people.
Manipura
Tantric sex term for the 3rd Chakra.

Mall, Escort Mall

A website that advertises many different providers. The providers may be independent or agency, and may or may not be associated with each other, or with the mall.

Mamasan

Female manager of a massage parlor.

Man in a boat, little man in a boat Clitoris

Mantra
Tantric sex term for a repeated verbal chant.
Manual Orgasm
Synonym for masturbation.
Manustupration
Synonym for masturbation.
Manwhore
A male prostitute.
Marital Aid
Synonym for sex toy, usually a vibrator or dildo.
Marital Device
Synonym for sex toy, usually a vibrator or dildo.
Marital Rape
Forced or unwanted intercourse within marriage.
Marital Relations
Sexual intercourse between two people who are married (to each other).
Masculine
Characteristics and behaviors that are associated with men.
Masochism
The act of becoming sexually stimulated or pleasured by receiving pain, discipline, humiliation, or punishment.
Master
The person in control during S&M or B&D role-play.
Mastigophilia
A paraphilia where a person is extremely aroused by punishment.
Masturbation Aid
Any object, usually a sex toy, that can be used during masturbation.
Masturbation Sleeve
A soft sleeve - usually made of silicone, latex, or rubber - into which the penis is inserted during masturbation or sexual play with a partner.
Mate
A term used to describe one's committed sexual, romantic, or "life" partner.
Mating
Sexual intercourse between two mammals.
Mazophilia
A paraphilia where a person is extremely aroused by women's breasts.

MBR

Multiple Bell Ringing (MSOG)
Meat
Slang for the penis.
Meatus
The opening at the tip of the penis, which allows both semen and urine to pass.

Mediterranean

Anal sex e.g. "She took me on a trip to the Mediterranean."
Medorthophobia
Fear of an erect penis
Megalophilia
A paraphilia where a person is extremely aroused by large objects.
Melons
Slang for breasts.
Membrum Virile
Latin for the penis.
Menacme
The period in a woman's life where she menstruates.
Menopause
The time in a women's life when her menstrual periods stop.
Menophania
The onset of menstruation.

Menorrhagia
Heavy or prolonged menstrual flow.
Menstruation
The cyclical shedding of the uterine lining in response to stimulation from estrogen and progesterone.

Merkin

Pubic hair wig.
Metophilia
A paraphilia where a person is extremely aroused by another person's face.

Metrophilia
A paraphilia where a person is extremely aroused by poetry.
Metrorrhagia
Menstrual spotting during the middle of the cycle.
Metrosexual
An affluent and often handsome heterosexual man whose self value is derived from his lifestyle and his appearance.
Mentulate
Having a large penis.

MG

Massage Girl

MIB

Man in blue, law enforcement officer.
Micro-Bullet Vibrator
A small vibrator that is shaped like an egg.
Midnight Cowboy
Slang for a vibrator or dildo.

Mileage

Amount of Value you get for your money out of an escort. A subjective term that describes value for money and/or how accommodating she is. Good mileage usually means she either charges less than average, provides better L/A/S than average, or both.
MILF
Abbreviation for "Mother I'd like to fuck".
Minger
Slang for an ugly or unattractive person.
Miserotia
An aversion to sex.

Mish

Missionary position, Man on top during intercourse
Missionary / Missionary Position / Missionary Sex
The traditional sexual practice of the woman lying on her back while the man penetrates her from above.
Mistress
Name for a woman who takes control in the SM role-play.

MJ

Massage Job

ML

Massage Lady. Make Love
MM
Abbreviation for mutual masturbation.

MMF, MFM, MFF

Threesome designations. e.g. MMF = male, male, female MFF = male, female, female.

Mohawk

A thin rectangular strip of pubic hair.
Moisture Barrier
A material, usually latex, used during sexual activity to prevent fluids or blood from passing between partners.
Molar Pregnancy
The result of a genetic mismatch that produces an abnormal growth instead of a fetus.
Molestation
Unwelcome touching or fondling.
Money Shot
When a man ejaculates in the final scene of a porn film.

Monger

Short for whore monger. One who frequents prostitutes.
Monkey Sex
Slang for wild, unusual or vigorous sexual activity
Monogamous
To be committed to a single partner.
Monorchid
Having one testicle.
Mons Pubis
The fleshy area located just above the top of the vaginal opening.
Morning After Pill
A hormonal contraceptive that is taken within 72 hours of unprotected intercourse to prevent pregnancy.

MP

Massage Parlor

MSOG

Multiple Shots On Goal. An escort or prostitute who will let you cum more than once.
Muff
Slang for vagina.
Muladhara
Tantric sex term for the 1st Chakra.
Muliberty
The adoption of female characteristics by a male.
Multi-Speed Vibrator
A vibrator that is capable of vibrations of various speeds.
Multigravida
A woman who has been pregnant more than once.

Multiple Pops

She allows you to have more than 1 orgasm during the session (e.g. more than one or multiple pops allowed)
Mutual Climax
When two or more individuals reach orgasm at the same time.
Mutual Masturbation
Two people who stimulate each other's genitals at the same time, or who stimulate their own genitals simultaneously are engaging in mutual masturbation.
Mysophilia
A paraphilia where a person is extremely aroused by dirt or being dirty).