Top Definition
One who has metal in their mouth.
Commonly referred to as "braces"
"Dat bitch is a tin grin!
lolz"
作者 BUBBASPARKZZZ 2007年10月21日
a smile on a person with braces
I think he would get more compliments if he didn't have that tin grin.
作者 The Return of Light Joker 2010年1月18日

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