own up

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

1. (idiomatic) to acknowledge, confess, or admit guilt or responsibility. Often used 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.