Since when did the word "cap" become slang for lying?

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Hinakuluiau posted...
It's easy to forget how white CE can be sometimes
The little bit of slang I know these days all comes from here.

It's always like "what does this mean"

And, it kinda varies between "haha yeah it's slang" and like, the pianist stops playing and the cowboys over at the card table all start gathering their chips and the marshall lumbers over to inquire just where the hell I come from.
There's a difference between canon and not-stupid.