When men kick their leg, and purposely make their scrotum hit their upper thigh, creating a flop noise.
My testes hurt, because I just performed the kick flop.
מאת RaisinLover 26 בספטמבר, 2010
"Dude, how'd you get that gnarly scar on your arm?"
מאת 8380364 29 בספטמבר, 2007