When at the beach, one scoops up a clump of moist sand and drops it in another person's bathing suit bottoms, then procedes to give the person a wedgie, thus ensuring that the sand is in the crack of the person's butt. Very painful...
Person 1: Hey man, you just gave me a wedgie!
Person 2: No dude, that was a sand wedgie
Person 1: It's gonna take me forever to get all that sand out...*pummels person 1*