Extra Terrestrial or E.T for short is the name for an Alien, that is not from this planet.
an extra-terrestrial, an alien
If you mean slang as in internet slang, then it means "Certified Old Fart".
YAF means in internet slang your a f*ck
SOS or soz as it is more commonly used is the internet slang for sorry
E.T. is an abbreviation for extra-terrestrial.
disconnected
it means *am*
In internet slang it usually means "No strings attached."
MOO is internet slang for "My Own Opinion"
Not right now.
Love And Kisses
NTH stands for nothing in internet slang.