look up any word, like bukkake:
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

Words related to Mollygwop

cockslap gwop molly mollygwap pwn