Top Definition
The oversized T-shirt that a obese person wears at a waterpark or swimming to cover their immense flab. When wet, it adheres to the blubber, defeating the purpose of wearing the shirt.
Her: Did you see the size of the cannonball that guy did?

Him: What guy?

Her: That guy, the one in the blubber shirt.
by dogstar7 March 23, 2010
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