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1 definition by Mario Berlinguer

 
1.
Originates from high five.

A belly five is an action, where two or more people jump up against each other so as to bounce off each others' stomachs.

Is often done as a symbol of celebration.
Dude, I just bought a can of Coke for the classic price of 30p! Belly five!
by Mario Berlinguer April 03, 2008