Top definition
Thinking you have a flat tire on your bicycle when in reality you are to messed up to be riding.
Works for any hilly city that has a good sized cycling and partying community - Seattle Flat etc.
Al was so stoned going home last night he had to check his bike for flats twice. Turned out they were Montreal Flats.
by Gravity Sucks August 16, 2009
Get the mug
Get a Montreal Flat mug for your mom Julia.