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1.
1) The sack that you get in a bar after pasisng out from too musch alcohol.

2) The act of t-bagging somebody at a bar who has passed out after drining too much.
1) Did you see josh last night? He passed out after 63 beers and then I bar sacked him.

2) Hey!! Look at that guy passed out over there. Let's go bar sack him.
by Cracker June 02, 2005