Definition of mess someone up in English:

mess someone up

phrasal verb

informal
  • 1Cause someone emotional or psychological problems.

    • ‘I usually try to think of what's going on right now, not what's happening next, because that kind of messes me up.’
    • ‘You know it messes me up when I sleep even a minute over.’
    • ‘Anyways, we got in really early, which shows you just how badly the traffic messes you up.’
    • ‘Anorexia and Bulimia are eating disorders that can really mess you up, even kill you!’
    • ‘Even with all the rhetoric about mothers and daughters, what the film seems to be saying is that women in your life will mess you up, and you should just take it.’
    • ‘As even the teen recognizes, it will just mess him up emotionally.’
    • ‘Plus, we were shooting nights and that messed you up completely because your whole day was upside down.’
    • ‘And when you talk to the officials, they think we're actually trying to bark at them.… It just messes you up.’
    • ‘Working nightshifts really messes him up for a couple of days after it.’
    • ‘This movie gave me the great insight that the way you get over an obsession is to shift your focus towards your parents, or the people who messed you up as a child, and try to forgive them.’
    1. 1.1US Inflict violence or injury on someone.
      ‘the wreck messed him up so much that he can't walk’
      • ‘You don't mess with me or get in my way, else I'll mess you up.’
      • ‘‘I'm gonna mess you up,’ he said to Rock as they squared off in the final sequence.’
      • ‘Don't even start with me, because I will mess you up.’
      • ‘The fight with that new watchman really messed him up.’
      • ‘My attitude is mess with me, I mess you up, more or less,’ I said smiling proudly.’
      • ‘One thing adults have over kids is an awareness of ways to seriously mess someone up and thus end the fight early.’