j/k -> just kidding
Nah... it stands for Joost van K.. (should I reveal his secret identity?), believe me...
omg -> oh my god
I'd translate it into Oh my gosh...
lmao -> laughing my a.. off
There's no word filter around, or maybe there is but it's defect.
It translates ass into a.. but leaves the rule of the third commandment unaffected.
A "

" with a serious undertone from a brother.

Paco