GDST 

A GDST is a God Damn Sexual Tyrannosaurus. They are really good in bed and please the ladies often

Did you hear about Mitch?

Yeah I heard he is a GDST

GDST by Immortal^( January 6, 2010

GDSTB

Abbreviation for the phrase "goddamn, shit the bed!", most notably used in Tool's progressive metal song "Rosetta Stoned". This abbreviation is uttered when the speaker has suffered a shocking or traumatizing experience, and wishes to express his emotion comparable to soiling one's self.

This may also be used in surprise and jubilation.

"John, I think I ate your lunch by mistake."
"GDSTB, Bill!"

GDSTB by Tawnysooz September 9, 2009