Ex To Be Avoided. Any ex bf/gf that has become unbearable, for various reasons.
'OMG! Jo has turned into a total ETBA! He keeps talking about us getting back together!'
by Birdie225 January 13, 2009
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1. The estimated time of arrival of one’s significant other.

2. Estimated Time of Arrival of Bae.
What is your ETBae? I miss you.

If she had given me the right ETBae, I wouldn’t have been waiting so long.
by MarinaCityBrian October 23, 2017
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