What do these slangs mean?

Well I ran into a Signaporean host playing cha with his buddies and of course they almost always feel the need to tell me how pro they are and how americans suck or some other garbage talk. So me being the true noob that I am decided to play a simple nooby siren build. Lets just say they were really pro I mean it just takes a lot of skill to some how beat yourselfs and feed me 22 kills in a 3v3 game.

All through out the game they were throwing slangs and text Im just wondering what some of them mean.

Sohai that word was thrown around the most.

Along with these text. la, lo, knn, cb

If anyone knows what those mean let me know.

la and lo are both chinese words, "la" and "lo" is actually put at the end of a sentense to express different feeling, "la" mainly expresses an emotion of unpatience, it is often regarded as impolite as well. "lo" mainly expresses the feeling of "not willing" or "lazyness", it is somehow regarded as disrespect and impolite when use in a certain way.

i have no idea with knn and cb tho.

Okay thanks what does Sohai mean do you know? If I had to guess I would say "So Gay" They kept saying that a lot. Like every time they died.

So Hai.. According to my knowledge, Hai means vagina, calling people Hai will be calling someone a vagina, as you can imagine. Combine with so, meaning you are "so a vagina", hence "SoHai".
However, Hai is very oftenly used to describe people with very bad attitude, and acting silly and impolitely, it also means "lame" in some situations. I guess when they said "sohai", they mean dying is lame or w/e. Hope i can help you with these slangs, shame on those sg people with these attitudes.

Okay thanks kon lol dont worry Im called much worse things on a day to day basis.

That is some weird slang