shrivelnuts 

When a man's jewels are so cold that they shrivel up into almost invisible peas.

"Hey man! I'm a freakin' shrivelnuts, this pool is WAY too cold to swim in!"

shrivelnuts by Melissa January 28, 2004

shovelnuts 

Reserving a seat when you get up/leave, and you plan to return. If someone takes the seat then they are subject to a shovel to the nuts.

"He didn't call shovelnuts on that chair, so I'm totally taking it."

shovelnuts by Alex Kesner and Chelsea Bunn December 31, 2007