When you lean forward usually to pull up your pants in a public bathroom, and your turd breaks off long ways and does a front to back sideways splash, splashing toilet water from the bowl up onto your ass
I was dropping a deuce at work and an coworker walked in, I pulled my pants up from around my ankles as I was braking one off and it did a Smelly Flop into the bowl.
by JOHNjFOLEY December 12, 2018
Get the Smelly Flopmug. by ARANAR July 23, 2003
Get the flop-a-domug. When an obese person (generally male) bits the Keg hose up his anus and proceeds to belly flop into a pile of vomit.
by BGBRLY December 6, 2019
Get the keg flopmug. 
Term used to describe a situation where a man fails to sustain a pre-existing erection. Often applied to instances where sex was imminent but did not occur as a result of the flopped straight.
Mike was so horny after making out with his girlfriend for three hours, but when she took her panties off and he finally realized he was about to lose his virginity, he got so nervous that he wound up flopping a straight, much to her dismay.
by Chonky December 9, 2008
Get the Flopping a straightmug. Auto erotic genital manipulation performed without the aid of one's hands. The flaccid penis is thrust about with aggressive hip movements and shuffling for between one and two hours or until erection occurs. The flopping off continues for another three to twelve hours when climax is finally achieved. Women with large clitori or labia minora may also engage in flopping off.
Guy 1: Man, I was flopping off like crazy yesterday. Took me like 13 hours but it was sweet, yo!
Guy 2: An all day floppoffathon? Gross!
Guy 2: An all day floppoffathon? Gross!
by Fatty Blumpkin March 17, 2015
Get the Flopping Offmug. 