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1.
KTA
the catchy shortened version of the popular superhero, Kelly the Amazing's name.
cilivian 1: Wow, KTA is the coolest superhero EVER!

cilivian 2: Yea, she really is amazing...
by kellytheamazing December 27, 2008
 
2.
KTA
Abbreviation for kill them all. From OFWGKTA (odd future wolf gang kill them all)
I'm so pissed today! Ugh, KTA
by blahblahbleepbloop September 05, 2012