Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Verb: fess up
  1. Admit or acknowledge a wrongdoing or error
    "the writer of the anonymous letter fessed up after they identified his handwriting";
    - make a clean breast of, own up, own, cop to [N. Amer], cop [N. Amer], come clean, fess

Derived forms: fesses up, fessed up, fessing up

Type of: concede, confess, profess