Similar to get a room, this is a derisive comment used about someone who is (or appears to be) drunk so often that they literally ought to "get a tab" at their local pub.
"my tim went young outside the, um...."
"are you pissed again?!"
"er.. I think-"
"god, man, get a tab!"
by I AM Mr Smith October 22, 2009
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The act of having someone open a new tab on their computer in order to find info on a subject on-the-fly.
Me: Man i cant shake this cold!

Steve-o (face buried in laptop): That sux

Me: Lemme get a tab, bro. I gotta google a remedy or i think i'm gonna croak.

Steve-o: Aight i gotcha
by Weezy Baby!! February 5, 2010
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