Pronoun, general catch-all. Insulting, compliment, term of endearment, etc.
a) Why did you do that, you stoomah? b) Great putt, stoomah. c)Those trousers suit you, stoomah. d) Nice crease in your pants, stoomah. e) You are a f-cking stoomah! f) What's a stoomah like you doing with a girl/guy like her/him? g) Your haircut makes you look like a stoomah. h) My grandma drives like a stoomah. i) What happened to your face, you stoomah? j) Cheers, stoomah! k) Love your work, stoomah!