masturbating with a flaccid penis
by Ryem May 2, 2016

The top part of the ass that flops out of fat peoples pants when they get up from previously sitting down.
by KrypticDeath July 14, 2010

person 1: milly flop
whem joshua hobberwanger flops the milly
whem joshua hobberwanger flops the milly
whem joshua hobberwanger flops the milly
whem joshua hobberwanger flops the milly
whem joshua hobberwanger flops the milly
whem joshua hobberwanger flops the milly
whem joshua hobberwanger flops the milly
whem joshua hobberwanger flops the milly
whem joshua hobberwanger flops the milly
whem joshua hobberwanger flops the milly
by Jason Elrod Hart March 10, 2022

by Sarah Lessard November 18, 2013

The act of covering the bottom of your scrotum with nasty things like old moldy cheese and slamming it on a lady's face.
Guy 1: what happened with you and Sam last night?
Guy 2: she was being a bitch so i dirty flopped her in the eye.
Guy 2: she was being a bitch so i dirty flopped her in the eye.
by RedPandaLover October 23, 2013

A term used for the nasty kids that sit and roll around in the hallway at lunch, and do not wash themselves or use personal hygiene products and wears NOTHING but flops, no exceptions.
by givemeyeeyeejuice April 22, 2019

"Jeeze Mate, I could a shagged that sheila last night but got the Fosters Flop at the last minute"
"Fair dinkum, that's a worry!"
"Fair dinkum, that's a worry!"
by Maur Schtupedschit July 1, 2005
