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1.
A more extreme and forceful version of Fark's gbtw meaning "Get The Fuck Back To Work".

This is usually a final reply to a long series of useless or unproductive statements to encourage a group to return to their jobs.
STOP wasting time you fucktards.

GTFBTW!!!!!111!!!!

Or I'll fire all you fucks and replace you with monkeys.
by TheRealHarmor April 10, 2011
 
2.
Acronym for "Get The Fuck Back To Work". Sometimes used as a truncated version of "GTFO and GBTW", but neither necessarily expresses the same magnitude nor the same feeling towards the person on the receiving end of the acronym.
A: "Dude - want to see some furry porn?"
B: "Not right now. We have to finish this project *tonight*."
A: "Hey I found a .jpg of Schwarzenegger fingering a chick."
B: "GTFBTW, you cock! Jesus..."
by derpity doo March 23, 2011