look up any word, like someoneelsie:

1 definition by Peter Boardman

 
1.
When someone is rubbing your grundle or sack area intensly, and you chafe to the point of bleeding and then you let out very thunderous bloody shart onto your partners face.
Peter got major grundle thunder from brandi last night, he came home bloody and smelling of shart
by Peter Boardman October 08, 2005
40 34