A term used to describe a situation where a person sleeps with someone just to live at their house but has no intent on being with that person.
- So is this your girlfriend?
-No, she just won't leave.
-Oh so she's a smash and crash!
by 3withaC October 6, 2015
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To purposely become intoxicated and either pass out or sleep on a floor/bed/sofa/animal/member of the opposite sex at an appropriate social event.
"Mark, are you smashing and crashing at that partay tomorrow?"

"Aye, I am pulling a 'smash and crash' tomorrow Alex"
by alexbericheath August 8, 2008
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Term used to define being so tired but still wanting to tear a piece off before passing out.
My girlfriend came in the room naked, but I was so tired last night after work, that it was just a smash and crash.
by DrSatch May 11, 2020
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An expression used to emphasise your lack of care at something. Can also be used to show your absolute shock at something. When used you instantly win the confrontation.

This term orginated from the awesome game "Crash Bash" for the playstation.
Tim : You havent washed the dog, hes covered in cow poo!
Tom : Why dont you smash my crash bash?!
Tim : OK sorry, i'll do it.

John : Why does my head hurt?
Bill : Mate! A car fell off the cliff on fire landed on your head, blew up and then i wee'd on it!
John : ...Smash my Crash Bash!
by Westy Testy October 17, 2005
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