Started as 'Fucking Awesome' then was reduced to 'fawsome' then to 'fawx'.

So, basically, it means 'Effing Awesome'.

A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.

An insult used to describe a annoying homosexual man or woman who is very self absorbed.

Variant on "Dawg", used in much the same context.