There are a number of different meanings for the word brick so don’t just dump it there’s some good stuff here:
1 Very cold. Usually only used to describe the temperature of a place, e.g. the weather or indoors in a particular location.
2 An unintelligent person. Derived from "thick as a brick."
3 A basketball shot in which the ball bounces off the backboard and/or hits the rim, but does not go though the net.
4 A large quantity of drugs packaged in a brick shape, especially cocaine.
5 An external power transformer that provides power from a wall socket to a laptop, wireless router, projector, etc
6 A piece of electronic equipment that has been rendered inoperable. This usually happens when trying to update the firmware or BIOS of the device, when "jail-breaking", installing new mobile phone ROMs, etc.
7 A large mobile phone.
8 British slang for a reliable person.
9 To bail, ditch, let down, not show up or do something as promised/agreed to.
10 To hit something or someone with bricks.
11 To avoid doing something because of fear, derives from shitting bricks.

When you meet with someone without anyone knowing except you and the person.

10 thousand US dollars cash, in 100 dollar bills.

a pound or kilogram of any drug (item requires clarification from speaker as to the amount intended)

An extended period of time

To wait for a long time

1) (adj) Very cold.
2) (v) To punch.
3) (n) A quantity of cocaine.

a basketball shot that on hits the backboard and bounces off