make a mess of

make a mess (out) of (something)

To handle something in a way that causes it to be disordered, damaged, or ruined. I had these books all in order but the kids rifled through them and made a mess of the whole thing. I'm afraid the accounting department made a mess out of these numbers. We'll need to re-tally the entire ledger.
See also: make, mess, of
Farlex Dictionary of Idioms.

make a mess of something

Fig. to mess something up; to ruin something. Give it a try, but don't make a mess of it. Jerry made a mess of the kitchen.
See also: make, mess, of
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

make a ˈmess/ˈhash of something/of doing something

(informal) do something very badly: We tried making some wine, but we made a mess of it (= it did not taste good). I made a complete hash of the whole exam.
See also: hash, make, mess, of, something
Farlex Partner Idioms Dictionary
See also:
  • make a mess (out) of (something)
  • make a mess/hash of something/of doing something
  • this is why we can't have nice things
  • rifle through
  • rifle through (something)
  • end of the ball game
  • the end of the ball game
  • (something) is the last straw
  • (something) is the straw that broke the camel's back
  • that's all for