Fake, not real, phony,
Origin>> .knock off.
(as in knock off purses, bootleg DVD's)

Constipation; from the common practice of knocking the table in the game of dominoes which signifies that you "can't go".

to take a hit at a joint or blunt. I wouldn't use it for a bong or dry pipe, but I suppose it is synonymous with hit.

usually a reserve for a pool/snooker game, that is left on the side of the table when someone else is playing, so that you 'reserve' your game after theirs, or after the knocks been put down before yours.

Someone who gets tricked or offended easily