Jackflip

verb: To perform a backflip while masturbating

OR

noun: A backflip performed while masturbating.

Harrison: OMG Jamie just double jackflipped!!

Astonished Onlooker: WOW! That's two jackflips in a row! Jamie's hella cool!

by hbhbhbhbhbhb November 9, 2011

jackflap

you know that thing that sticks out between a man's legs? that

Jeff's jackflap is huge

by Johnny Clarkey July 30, 2007