Top definition
A Dumb-billy is a Chicago slang about a person who is more dumb than a hilly-billy.
"Freak you Dumb-billy". "You're such a Dumb-billy".
by bumbillysnitches November 29, 2012
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug