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1.
An oral sex position where a man is on all fours and his penis is pulled to his rear (through his legs) and fellated from behind him.
Sunny was backblowing him while fingering his asshole.
by Slangeek February 25, 2010
 
2.
basicly when you take a drag from a cigarette, then blow the smoke into someones mouth and they inhale.
daym, look at those two hot chicks back blowing.
by voldemort9999999 September 04, 2010