The act of having sex and then leaving with no strings attached. A one-night stand.
'Are you going to call that girl you hooked up with last night?'
'Nah, it was a smash-n-dash.'
by D. Bougs August 29, 2006
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To have sex with a girl and then leave her and act like you never met her.
aye nigga, im finna pull a smash n dash on this bitch right here.
by Skr8 Savage June 1, 2016
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