When your walking down the hallway at school and 2 groups of trashy people come up on either side of the hall and refuse to move so you get smashed between the groups.
"I was walking down the hall and was totally white trash smashed."

"I hate that hallway, there are so many white trash smashes down there"
by Immmalee February 13, 2009
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When you have sex with a girl (smash) and then shit talk her behind her back (trash). Generally only done by douches.
Person 1- Dude, that chick Ruby is a total buster.
Person 2- Didn't you nail her?
Person 1- Of course. It's the classic "smash n trash".
Person 2- Dooooooooouche.
by poony mctang July 12, 2010
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