gack blowing

The practise of filling a drinking straw with Cocaine, inserting one end into a willing anus and then blowing the cocaine into the Ass.

Not caught on too much this, however a longer high and better use of the Coke can be had up the arse, then nasally, apparently.......

After both Nostrils where full of Blow, Britney Spears was reaching for the straw after learning about Gack Blowing

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