This comes from the will it blend videos starring Tom Dickenson. Following blending somthing inedible, such as marbles, he says somthing like...
Glass smoke- don't breathe this

iPod smoke- don't breathe this

magnet smoke- don't breathe this
by cheeseflambe April 17, 2010
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When people hold their breaths, it's mean they're expecting something happen. So this means as an advice that "don't expect, it will not happen"
You can’t touch me now there’s no feeling left
If you think I’m coming back don’t hold your breath
What you did to me boy I can’t forget
If you think I’m coming back don’t hold your breath
(Lyric Don't Hold Your Breath - Nicole Scherzinger)
by SunnyApple July 19, 2011
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What you say to your lover when you're deepthroating his member
Girl 1: FUCK don't let me breathe
Boy 1: my c**** is so big you won't be able to babe girl don't worry
by physicsslut101 November 16, 2017
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