SE in slang uses
[1970s] (drugs) morphine.
[1950s] to make an effort, to commit onself.
[20C+] to understand, to know what is happening; to know about.
[1940s+] not breaking any rules, law-abiding.
[early–mid-19C] to behave properly.
[late 17C–early 19C] a drink, esp. of brandy.
see separate entry.
[1920s+] (orig. US) breaking rules, unacceptable, out of the ordinary.
1. [1920s] drunk.
2. [1910s] to excess.
see under sweat v.2
[mid-19C] (UK Und.) awaiting execution by hanging.
[1920s–30s] wait a minute!