Male camel toe
. When the seam of the trousers rides up and digs into the scrotum, seperating the testicles so that one is on each side of the offending seam. Thus creating a visual display that is reminiscent of a chipmunk with its cheeks stuffed with food, but not in the slightest bit cute. When it happens suddenly, it is accompanied by an instant look of discomfort and the need to slope off and rearrange ones giblets.
"Guys, wait here, I'm just going round the corner to sort out these chipmunk cheeks"
"Can you SEE that bloke on the barstool?? Look at the chipmunk cheeks! How can he not feel that??"