Gary

UK slang for pills - ecstasy, etc.

Me: I’m off a Gary lad
Marcus: I know lad these minions are power

power ched

Ched is UK slang for cannabis - derived from the word Cheddar/cheese.
Power means that it’s “strong” or “potent”

Me: That’s some power ched lad
Sean: I know lad I’m seeing fairies