When the penis is not fully erect and your partner which is usually a female, decides to tease it by slapping it around.
Greg: Margret! Get over here and cock flip me!
Margret: Shut the hell up Greg, you can always depend on me to erect your penis you old frog!
Margret: Shut the hell up Greg, you can always depend on me to erect your penis you old frog!
by JOEYJM10 March 30, 2015
Get the Cock Flipmug. 
You start out doing doggy style. She is hanging off the bed. You go about 30mins. a mirror really sets the mood then when she is just about to have an orgasm perform the Houdini Flip, you flip her over while she is still hanging off the bed, and then go another 30mins. normal. Then after she gets over her orgasm she won't remember how she got turned this way.Trust me
by Bonnie&Clyde2142 August 1, 2010
Get the Houdini Flipmug. When two men are having sex, flip-flopping means to penetrate and to fuck each other’s anal one after the other. It often implies a longer sex; not to fuck and to reach to the ecstasy one by one, but to continue the cycle to stop fucking then to get fucked.
by S.C.O. October 24, 2019
Get the Flip-floppingmug. To change ones sexual orientation over a short period of time due to ones inability to successfully attract the opposite sex.
Mate, did you hear? Davo totally did a "ross-flip" last week after Isobel rejected him. He's with Edward now.
by cullin69 June 8, 2010
Get the ross-flipmug. the process of taking a bird, normally a pigeon and turning it upside down in an effort to see its genitalia
by mc ebony May 8, 2003
Get the flipping the birdmug. by lizk14 January 28, 2020
Get the flip the switchmug.