When a man gives himself a prostate orgasm and ejaculation by laying on his stomach and flexing his ass muscles up against his prostate to stimulate it. This can be done when the penis is either erect or flacid, and nothing needs to go inside your rectum. It's like bottoming solo.
Luke doesn't jerk off, he flexes off. Why can't you masturbate like everybody else does, Luke? Why do you have to figure out ways to have better orgasms and keep this shit a secret, Luke? I want to flex off too. Wow I bet Luke is great in bed, he knows all kinds of secret tricks.
by IcyHot June 9, 2017
Get the Flex Off mug.
When more than one person is doing a Knowledge Flex
Our meeting went for 2 hours over time with those 4 people constantly having a knowledge flex off
by Cozza Collins May 1, 2008
Get the Knowledge Flex Off mug.