the money you are gonna spend on drugs, mainly marijuana, that you have set aside to get you high.

No Bull Shit, and old hacker acronym which is usually used to signify that the talk will be serious.

"bricks for the high" is a large quantity of drugs that are for sale.
a brick is a kilo of a drug, usually cocaine.

if you get high, i got the shit that'll do it to you.

i got the bricks for your high