When you put on a hat for a long period of time, and after taking it off, your hair takes the shape of the hat. Usually occurs when your hair is particularly greasy.
-After a game of golf, Malvin takes his cap off-
Oliver: Dude, you've got hat head, when was the last time you showered?
Oliver: Dude, you've got hat head, when was the last time you showered?
by jun0! November 23, 2008
when you are wearing a hat for a very long time and your hair then becomes flat and you then look like an ugly turd.
by YessicaShmallen November 30, 2018
by Howard Cook January 01, 2006
When listening to music, instead of bobbing ones head to the beat, one bobs ones head along with the hi-hat.
by toddmyers January 06, 2010
When a male has sexual intercourse with at least three different partners in a 24 hour period. The act must involve oral sex from the third partner without the male having showered after the prior partners. The act may also include ATM with prior partners.
Tim had a great weekend. He took down four broads and walked away with hat trick head as his final act.
by Richard Hangslow February 18, 2019