A session of masturbation.
Initialism of familial adenomatous polyposis.
In plain English: Familial adenomatous polyposis is a genetic condition causing numerous growths in the colon that can lead to cancer.
"Genetic testing can identify individuals at risk for developing fap."
Usage: FAP is an initialism, not a word itself, standing for Familial Adenomatous Polyposis-a genetic disorder characterized by numerous polyp growths in the colon. Use it specifically when discussing this medical condition and always write it as "FAP.
To masturbate.
In plain English: To manually stimulate oneself for sexual pleasure.
Drunk.
"After a few glasses of wine, he was feeling quite fap and started singing loudly."
To indicate that someone (normally the speaker) is either masturbating, or inspired to by sexual arousal.