Green’s Dictionary of Slang

screech n.

1. [late 19C+] cheap, rotgut whisky.

2. [1900s] (US) a complaint (to the authorities).

3. [1900s] (US) a hit, a success.

4. [1970s+] (gay) the throat, the mouth.

In derivatives

screechers (adj.)

[1940s] drunk.