mars bar party 

Where a girl shoves a mars bar pussy and a guy eats it out

Hey guys theres suzzie lets have a mars bar party

mars bar party by Jon Dohe January 30, 2004

Mars bar party 

gay house party or similiar. basically a gay orgy. tend to find them in coastal towns of britain, such as brighton, bournemouth, hartlepool and seaburn.

corey and randy went to a mars bar party up the headland in hartlepool. they took sausge up the exit hole all night

Mars bar party by southerner in the north July 29, 2004