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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.
by RaisinLover September 26, 2010
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When you try to do a kickflip on a skateboard, you mess up and it lands upside down.
"Dude, how'd you get that gnarly scar on your arm?"

"I kickflopped."
by 8380364 September 29, 2007
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