1 definition by CRSRTHO

Top Definition
To strike a person forcefully and repeatedly in the cranium with your penis

Similar to a Cockslap, however a cockslap is more playful wheras mollygwopping someone is more of a physical punishment.
I found out Sarah was cheating on me so I Mollygwopped her to let her know that I wasn't fucking around anymore!!
by CRSRTHO November 19, 2009

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