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15.
ETA
1) Estimated Time of Arrival
or....
2)Estimated Time of Awesome...because it's awesome
The ETA on those reinforcements is about 12 million days...so...you're gonna die

The ETA is tommorrow at 8pm, when my baby impaling kit arrives
by Boo Radley 1000 May 08, 2006
 
16.
eta
Short for extra-terrestrial activity
Area 51 has a massive ammount of eta goin on
by frank postascio July 18, 2005