by Vanderweasel September 24, 2019
Get the Moose grundlemug. During a fart, when air is compressed between the grundle and a hard surface- the air erupts to the nearest exit, usually out the front of the crotch. It is thunderous, not just for the thunderous noise it makes, but also because of the unsettling direction of the blow.
by ceegee2 January 23, 2013
Get the Thunder Grundlemug. when you are plastered off your arse and you hook up with someone so hideous not even fugly can cover how revolting this person is.
by ohmahjeeehaud February 4, 2008
Get the grundle crustmug. by tobyistheworst November 18, 2011
Get the Face Grundlemug. by Gicky September 4, 2007
Get the grundle puntmug. by Jimmy Dean May 16, 2004
Get the Grundle Schnacksmug. 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.
by Peter Boardman October 8, 2005
Get the grundle thundermug.