1. fist-fuck - Noun
2. fist-fuck - Verb
fist-fuck (plural fist-fucks)
(vulgar, slang) sexual practice in which a (fisted) hand is inserted and moved in or around the vagina or rectum.
fist-fuck (third-person singular simple present fist-fucks, present participle fist-fucking, simple past and past participle fist-fucked)
(vulgar, slang) To insert and remove and move a (fisted) hand in someone's vagina or rectum.