How one buys milk in most of Canada, with milk coming in packages of three one-liter plastic bags, instead of the more effective jug or carton, thus proving that Canada is stupid.
"I threw milk bags at a stupid Canadian the other day. It was funny! You should try it sometime."
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The act of being hit in the face with a breast.

i.e. the female equivalent of tea bagging
Dude 1: Hey man, who gave you that shiner?
Dude 2: Dude, my girlfriend got a little intense with the milk bagging last night. You can see my face-print on her tit now! It's like the breast of turin or something.
by damoroso December 20, 2010
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The act of slipping the condom off and tying it in a knot. Then adding it to your collection of used condoms.
I was making the rounds last night to all my sugar daddys and milk bagging everyone of them. Some day these treasures will be worth something.
by Falken January 17, 2003
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when placing a paper bag over an girl's head, and then proceeding to jizz in the bag and then shaking the bag around her head!! If left to Dry it will be very hard to remove the bag.
Dude 1: Dude why is she walking around with a paper bag on her head!

dude 2: Dude i gave her a milk bag but i forgot to tell her to take it off!!
by edzi! January 29, 2010
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A white person that thinks their strong but in reality they will break down if so much as touched by a toothpick
"He thinks he's so tough and yet he can't fight. Fucking Milk Bag"
by KazKazTheWicked March 5, 2017
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A form of giving boob sex where the breasts are moved out of unison, alternating the left and right breast in circular motions creating a "wax on, wax off" pattern.

Alternately, having sex with a Canadian package of bagged milk, though not as enjoyable.
"she had her boobs in her hands tossing them up and down... I think she was practicing for that milk bag buff she's been promising me"
"dude, you are so lucky! she has such great milk bags!"
by WifeyKnowsBest September 12, 2011
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It is a canadian sex act where milking girl is on all fours, with her breasts hanging in free air, then they are milked like a cow, with occasionally giving her nipple crunch, and some light punches in the breasts. To make it more interesting usually a man also does the girl in her ass in doggie style during this.
When she said she had delivered baby just a few months ago, the gang got excited to do Manitoba milk bag with her
by Killer Gunshot November 25, 2010
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