monkey marbles 

A slang name for the popular drinking game Beer Pong. Usually said in a thick Manchester Accent.

Oi, mates, anyone up fer a game a' monkey marbles!

monkey marbles by themobe27 June 11, 2009

Monkey's Marbles 

For use when ladies are present, instead of mutt's nuts or dog's bollocks
Commonly used by professional photographers to describe the excuse of digital cameras as a work tool.

"...having a digital camera is the real Monkey's Marbles, you just take 1000's of shots... one of them has to be good, right?"

Monkey's Marbles by Jim Fotographer July 28, 2008