Verb: (ˈhan(d)ˌSHāk/,wiTH/snāk-S/) Orig: Victorian
England c. 1535(AD)
Slang verbiage, historically meaning "clandestine
hand-jobs with strangers".
Modernly, it is used in conjunction with, or to replace the verb "fap" or "fapping" in groups(strangers or otherwise).
Ed liked handshakes with snakes, at the park, on
sunny afternoons.
Allen and his friends had a handshakes with snakes session, all
afternoon.