Did you by any chance mean beta?
Definitions
Wiktionary
- v. transitive To strip of a tag or tags; to remove the tags from.
Etymologies
- de- + tag (Wiktionary)
Examples
“Of course, if you choose to leave your Facebook privacy settings wide open, if you choose to befriend someone you only met once on holiday to Magaluf, and if you then compound the error by posting or failing to detag a photograph of yourself in a compromised state with a vodka luge, then there might be certain drawbacks.”
“You detag pictures of yourself together, and in some instances you might even DEFRIEND him (this is intense, although I did once have a boy block me entirely, mostly because he was unstable.)”
The Huffington Post: Meredith Fineman: Fifty First (J)Dates: Facebook Me.
“But the service does offer a range of protections and controls including the option to detag locations, notifications if friends add your location and the option to disable Places entirely.”
The Guardian: Facebook Places location tool unveiled, sparking fresh privacy concerns
“Athletes and other students concerned about their image have also learned to quickly troll Facebook after incriminating parties, seeking tagged photos of themselves that they, of course, detag.”
“He didn't manage to detag the Elephants pic before stealing it.”
Lists
These user-created lists contain the word ‘detag’.
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Words of the Times
Words discovered while reading The New York Times, each with a citation from the paper.
testilying, ghost talk, apneist, solastalgia, izakaya, hooker, telectroscope, airflyte, phomance, bromhidrosis, stinky feet, cupping and 482 more...
Tweets
Looking for tweets for detag.

john "'I’m wearing all these totally awful ’90s clothes. I look like crap. And I’m like, Why are you people in my life, anyway? I haven’t seen you in 10 years. I don’t know you anymore!' She began furiously detagging the pictures — removing her name, so they wouldn’t show up in a search anymore."
The New York Times, Brave New World of Digital Intimacy, by Clive Thompson, September 5, 2008 Sep 8, 2008