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1.
4xC
Abbreviation for coo coo ca choo, which means everything is fine; was used for example by The Beatles or during hippies era.

Nowadays, 4xC is used in cannabis culture among stoners as a sign of weed, pot, smoke time, whatever related to smoking marijuana and having a blast!
A: "Heey, what's up?"

B: "4xC, that's wasup!"
by Ly (4xC) April 21, 2009