What is Saala?
1.
Saala is the hindi term for your wife's brother. However it's most commonly used as an insult, with the implication being that you are sleeping with the insulted persons sister.
In everyday usage nobody takes the original meaning too seriously. It can be substituted as a generally insulting term for any person. e.g "Saala kutta" where "kutta" is Hindi for dog. Doesn't make sense if you think of the meaning of the word, but it is a widely used insult anyway.
Can't think of any way of using it in an english sentence that wouldn't sound terribly awkward. The best you can do is just say "Saala".
See
2.
slang. expression of disgust
saala suor!
