A sandwich made out of the crap and shit you find around your house. (ex: bread, lettuce, a smashed egg, AA batteries, bodywash, a frozen burger, a shell, baby carrots, etc.) This is always a fun thing to make. Wrap it in plastic, and hide it in your friend's closet, or sock drawer. Also may consist of literal shit.
1.)A crab shit is when you have to take a mean shit and you have to mount the toilet and put you whole body on top of the toilet seat in a back-wards crab position.
billy: hey alex
alex: ya?
billy: why is there footprints on my toilet seat?
alex: oh i was just taking a crab-shit why?
billy: ok well theres poop on the seat to...
alex: ya i sliped