Top Definition
To get an assassination medal in halo 3 by meleeing in the back. Commonly used by tsquared captain of the halo 3 team Str8 Rippin
Tsquared: Give em' the back smack baby!
додав BoweTheShow 22 Червня 2009

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action verb: To strike another person because they have just pissed you off. One can backsmack by thought, word, or deed.
Steve: "Did she just cut you off?"
John: "Yeah, I 'd like to backsmack her!"
додав Lexie 1912 19 Вересня 2008

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To violently slap someone on the back.
"Dude, it hurts so bad!"

"Take that back smack bitch!"

"Did you see Todd totally get fucked up, that was the worst back smack I have ever seen!"
додав Tango09 31 Березня 2010

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To talk about someone behind their back
Brittany:"wow she looks really ugly"
Jessica:"sorry I don't backsmack"
додав Backsmack 12 Вересня 2014

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