Green’s Dictionary of Slang

drop v.2

[the money is dropped on the table]

1. [late 17C+] to pay over money, to spend money.

2. [19C+] to lose money.

3. [mid-19C; 1960s] (US Und.) to sell something inferior for more than it is worth.

4. [mid-19C; 1920s+] (US Und.) to sell stolen property to a receiver.

5. [1900s-50s] to bribe.

6. [1920s+] (orig. US) to pass dud cheques or counterfeit money; thus dropping n.

7. [1930s] to hand over drugs.

8. [2000s] to give.

In compounds

drop man (n.)

[1960s] (drugs) a wholesale drug dealer’s runner, who delivers bulk supplies to less important dealers.