Top definition
verb: To perform a backflip while masturbating


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 08, 2011
Get the mug
Get a Jackflip mug for your bunkmate Larisa.