It's when you're playing football and you noticed just before you get tackled in the nuts that you lost your jock strap... OR DID YOU!? No! the man that hides in your ass and comes out when you undress ate it.The only way to stop a jock strap vampire is to take a shit in your jock strap and eat it. Also do someone up the butt when they drop their soap and douche your anis. This will paralize him. to kill him you must rip your penis off and shoot him in the eye.
Todd: Man my nuts hurt like hell after that insane tackle.
John: You have nuts?
Todd: Not anymore after that Jock Strap Vampire ate my strap