In contemporary slang, to say a person committed suicide is to say he "offed himself".
'you get it?'
In 1930s slang, you could say "What's the good word?" to greet someone.
flanel- but you have to say it like slang e.g fla-naal panel-but you have to say it like slang - e.g pan-aal canal-no slang required.
Nuffing
You might say "Can do!"
Since back slang is putting it backwards, it would be TAHW
I think the slang you are talking about is "SNM" which means: Say no more.
Say no more, it's slang
you just say "otha"; duuh!
There's not really a slang meaning - people say "whatever" in a sarcastic way to say that they don't really care about something, but it's not slang. It still means the same thing.
Some say "Hi" is a slang. If so, then it is most used.