foul up - definition and synonyms

phrasal verb [intransitive/transitive]
present tense
I/you/we/theyfoul up
he/she/itfouls up
present participlefouling up
past tensefouled up
past participlefouled up
  1. 1
    to do something wrong, or to spoil something, especially by making mistakes
  2. 2
    same as foul2 (sense 4)

    Watch out for driftwood which may foul up the boat’s engine.

See also main entry: foul