own up - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

own up (third-person singular simple present owns up, present participle owning up, simple past and past participle owned up)

1. (intransitive) To acknowledge, confess, or admit guilt or responsibility. [with to]

   Synonyms: fess up, come clean

   I'll own up: I glued your mouse to its mat.

   If you own up to breaking the glass, you'll be forgiven.