Definitions by CRSRTHO

Mollygwop 

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!!

Mollygwop by CRSRTHO November 20, 2009