What is Glass Treadmill?
1.
adj. Used to comment on the physical appearance of someone who is (or is suspected of) smoking pure methamphetamine (also known as P).
Yo, that dude Jay is looking real skinny, like he's been running on the glass treadmill.
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what you'll have if you have to pee really bad but don't go
"if i dont find a bathroom soon, i'm gunna have an expu..