sell someone out

1. 1.

   give information that compromises others

   Broaderdenounce

Questions about sell someone out

What does sell someone out mean?

sell someone out means "give information that compromises others".

Is sell someone out a common word?

sell someone out is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.