stuff up

/S T AH1 F AH0 P/
verb
  1. 1

    To ruin or harm.

    โ€œDon't drink tonight, because it'll stuff you up before your business trip.โ€

  2. 2

    To make a big mistake.

    โ€œWe lost the match because of the goalkeeper stuffing up.โ€

  3. 3

    To cause (the nasal passages) to be blocked.

    โ€œMy nose is all stuffed up so I'm speaking funny.โ€

Source: https://en.wiktionary.org/wiki/stuff%20up