To grind or chew. It sounds like masturbate so dumb fucks who are too lazy to figure out its real definition assume it means masturbate. It's a funny word and has power.
Synonyms for masticate
On this page, you will find 30 slang terms related to masticate. Some of the top words include: masticate, Slap the Sausage, whacking off, smackin in da pants, Playing with the dirty sock, and 25 more.