the number before 21 and after 19. generally used when counting.

location or current status/activity

Bag of Weed, costs $20.00 dollars and is enough to make 4 fat joints.

part of a series of '10-codes' that many security officers & law-enforcement-types use, the '10-20' code refers to receiving a location coordinates from a second party at the other end of the line (over distance radio transmission). '10-4'- meaning that the transmission has been received.

Refering to a $20.00 bag of marijuana.
Also known as a "twin"

Location.

Derived from the lingo of CB radio users

the size of the rims on a car