The embarrassing(and sometimes painful) act of your balls hitting against your thigh or leg while walking or running
by Brett50Cal July 13, 2012
"Kevin did da flop-flop at da playground... It was so small, it aint even look like it was movin!!!"
by Destinee May 13, 2005
Sit: havr you sern my sister
Jason: yes shes very nice
Getrenv: yes shes smoking hot, i want to flop flop nigga her.
Jason: yes shes very nice
Getrenv: yes shes smoking hot, i want to flop flop nigga her.
by SitInYourRoom July 05, 2020
by Jonnnnnnnnnn April 18, 2009
by Littlest pet shop PUffiN October 02, 2020