Terrell Owens -- Called Out By Estranged Wife ... Over 'Wife Swap' -

Terrell Owens' estranged wife Rachel Snider is livid at the former NFL star ... publicly bashing him for appearing on "Celebrity Wife Swap" with another woman ... while the two are still married.

Owens and Snider separated after three days of marriage back in 2014, but they're not officially divorced. So when Snider got word that T.O. was appearing on "Celebrity Wife Swap" with another woman and family ... she blasted him (and the network) on Twitter.

"No I don't know who that woman is , and no I do t know how @usacelebritywif has my estranged husband on there with this woman," Snider wrote.

Owens fired back ... telling Rachel, "U're nothing to me. U just want attention."

The whole ordeal was beautifully chronicled by our friends at BSO, and we've put all the the tweets in a gallery below because frankly ... these two talk a lot.

Check out the drama.