pancake sac 

when one presses his scrotum against a glass door, having an audience on the other side of the door watch it expand to the size of a pancake; leaves a sweaty and/or greasy residue on said window

"Dude, Alan, bust a pancake sac on the window or I'll give you a Cleveland Steamer! Gosh!"

pancake sac by Robbie November 12, 2004

pancake your yam sack

The process of converting a man's genitals into pancake-like objects by applying extreme force using a blunt object (i.e, one's foot).

Betsy said to Owen, "If you don't stay away from me you creep, I'll pancake your yam sack!"

pancake your yam sack by NatlTony August 1, 2008

Pancake your yam sack

The act of transforming a man's genitals into round, flat objects resembling pancakes. Usually accomplished through the application of extreme force delivered via a baseball bat or one's knee, foot, fist, or elbow.

Betsy said, "Owen, I haven't told you this before, but I have a 3rd degree black belt in Karate. If you don't keep your distance from me I will seriously pancake your yam sack."

Pancake your yam sack by NIIC-T August 27, 2008

sacrificial pancake 

The very first pancake that is cooked. Typically turns out to be the worst one in the batch due to an improperly prepared pan. Can be used to refer to a terrible 'first' of anything.

The recipe says it makes eight pancakes, but it's really only seven because no one's going to eat the sacrificial pancake.

She winced, thinking about her earliest dating fiasco, but comforted herself by deciding that her failure of a first boyfriend was merely the sacrificial pancake in her dating career.

sacrificial pancake by quenelle March 8, 2012