Top definition
The most retarded looking thing a human can wear on their head. Usually worn by teenage or mid-20something males to look "cool."
"Look at that tool over there, with the Flat Bill Hat"

"Check out my hat!" "Sorry bro, you look like a retard."
by Snarky48 June 17, 2013
Get the mug
Get a Flat Bill Hat mug for your father-in-law Paul.