Stuff up

verb, slang

Definitions

Verb
  1. 1
    To ruin or harm. slang, transitive

    "Don't drink tonight, because it'll stuff you up before your business trip."

  2. 2
    To make a big mistake. Australia, UK, intransitive, slang

    "We lost the match because of the goalkeeper stuffing up."

  3. 3
    To cause (the nasal passages) to be blocked. transitive

    "My nose is all stuffed up so I'm speaking funny."

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