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


Verb: button up
  1. Refuse to talk or stop talking; fall silent
    "The children button up when their father approached";
    - close up, clam up, dummy up [N. Amer], shut up, belt up, be quiet, keep mum

Derived forms: buttoning up, buttons up, buttoned up