Top definition
When a male inserts his penis into the little hole of a hat where you can adjust the tightness of the hat.
Jack: "Man, my dick really hurts from lastnight..."
Jeff: "From what now?"
Jack: "I hat fucked my flatbrim hat because my wife wasn't in the mood."
by BlackLaceThong May 30, 2016
Get the mug
Get a Hat Fuck mug for your friend Sarah.