In informal chat conversations online, I have seen Spanish speakers write the abbreviation "xq." What does this stand for, and why?
It essentially means porque
x is widely recognized as the multiplication sign. To say it one says por.
and q is the abbreviation of que. Being just a q there are no words I can think of that are monosyllables and that start with q. So it is safe to assume it is que.
In SMS/chat slang: