shape up - definition and synonyms

phrasal verb [intransitive]
present tense
I/you/we/theyshape up
he/she/itshapes up
present participleshaping up
past tenseshaped up
past participleshaped up
  1. 2
    to improve your behaviour or your work

    The new boss has warned Roger to shape up.

    1. a.
      shape up or ship out mainly American informal used for telling someone that if they do not improve their behaviour or their work they must leave
See also main entry: shape