When you ejaculate semen into your fist, then forcefully shove it up a girl's vagina.
Jason: Did you hear Linda was pregnant?
Mary: No, but I could tell from the bruises that it was because Paul gave her a herky!
by bill job September 30, 2006
(n) used to describe any fat animal shaped like a football.
Wow, that cat is herky!
by tammy March 04, 2005

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