The Open Dictionary

in flagrante

adverb

UK/ˌɪn fləˈɡræn.teɪ/
US/ˌɪn fləˈɡræn.teɪ/

Definitions of in flagrante adverb

  1. in the very act of committing a misdeed, particularly when caught engaging in an illicit sexual act with someone other than one's spouse or regular partner

    • The police apprehended the suspect in flagrante delicto as he was attempting to destroy the evidence.

    • She arrived home unexpectedly to discover her partner in flagrante with her colleague.

    • The paparazzi caught the celebrity in flagrante outside a bar with a stranger.