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1.
Different way to say let's go;

originated in a small texas town in the late 70's by some stoners cuz its a quicker and more efficient way to say let's go
Reggie: damn this party is tight

Jamal: dude tsgo I heard the cops were coming
by AD3pC August 28, 2010
 
2.
slang for Lets go
Bubba: "Tsgo so we aren't late!"

Alex: "Shut up i gotta put my shoes on!"
by BubbaD August 23, 2010