What is You Know You're Cool When?
1.
Used as an expression when someone does something so randomly stupid its funny. its sort of like, the action is the word after the "u know ur cool when" so "u know when ur cool when (you've peed in a can)"
guy:i just peed in a can
girl:You know you're cool when
Random Words:
then my truck went Whoopa! into a tree
2.
Used to define a person which is acts just silly or out of place.
Oh Whoopa. You and your danci..