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1.
1. Derivative of hot smash. Describes the result of taking a hot smash in one's pants, leaving said smash between one's butt cheeks, thereby creating a smash-sandwich.
*A smashwich is similar to a shart but a bit messier.
Lex: Guys, I didn't make it to the bathroom and ended up with a smashwich.

Guys: Lex, that is nasty. You're gonna have skids.
by King Sexy November 29, 2005
 
2.
A game played by smashing opposing player's sandwiches in a cafeteria-style setting. Any undefended sandwich is eligible for smashing. The rules are as follows:
1) You may smash any undefended sandwich.
2) A sandwich is defined as any edible food object comprised of at least two pieces of bread with food-filling.
3) Any sandwich covered by a quarter-sized or larger object is "defended" and is not eligible to be smashed.
*If you smash a defended sandwich, you must provide its owner with one identical new sandwich, and they are entitled to karate chop you in the throat.
4) Any sandwich that has been smashed MUST be eaten by its owner anyway.

*If you get mad, throw the sandwich away or otherwise don't eat the sandwich, your smasher is entitled to karate chop you in the throat.

Additionally, in your own cafeteria setting, you may give individuals the option to opt-in or opt-out of the game of Smashwich at its initiation. If an individual who is not opted-in to the game smashes a sandwich, they are thereby opting in to the game of Smashwich. There is no opting out of the game of Smashwich.
Ian: Dude, Nate's sandwich is undefended."
*someone smashes Nate's sandwich*
Nate: Good thing I love flat sandwiches, douchebags...
Ian: YOU CAN'T GET MAD!!! *karate chops Nate in the throat*

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Loki: Dude, Miranda's sandwich is begging for a smash right now...
Lucas: I got this. *spike-and-spreads the sandwich*
Loki: LOOKS LIKE YOU'RE OPTED IN NOW BITCH *SMASHES LUCAS'S SANDWICH*

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In the game of smashwich, you eat or you die.
by kooteraga October 26, 2013