- FRAZIER
- FREEBALLING
- FRENCH
- FRENCH KISSING
- FRENCH TICKLER
- FRENULUM
- FRESHMAN 15
- FRIEND ZONE
- FRIENDS WITH BENEFITS (FWB)
- FRIG
- FROG KISSER
- FROT
- FROTTAGE
- FUCK BUDDY
- FUN AND GAMES
- FURRY
- FUTURE FAKING or FUTURE FAKER
- G-SHOT or O-SHOT
- G-SPOT
- G-STRING
- GAFF
- GANG BANG
- GANG BANGER
- GAPE or GAPE SHOT
- GAY AFTER THREE
- GEEK
- GENDER-BENDER
- GENDER DYSPHORIA
- GENDER FUCK
- GENDERQUEER
- GENITAL ACNE
- GENITAL BEADING or PEARLING
- GENITALS
- GET OFF or GETTING OFF
- GFE
- GHOSTING (GHOSTED)
- GIVE HEAD
- GLANS
- GLORY HOLE
- GLORY-HOLE PROTOCOL
- GO DOWN ON
- GOATSE
- GOBBY
- GOING COMMANDO
- GOLDEN DOUCHE
- GOLDEN ENEMA
- GOLDEN SHOWERS or PISS PLAY or WATER SPORTS
- GONADS
- GONORRHEA