flagrante delicto

1. In the very act of committing an offense; red-handed.
2. In the act of having sex.

Origin:

Origin: Medieval Latin flagrante dēlictō, while the crime is blazing

Origin: : flagrante

Origin: , ablative of flagrāns, blazing

Origin: + dēlictō

Origin: , ablative of dēlictum, offense