English

Verb

foul up ‎(third-person singular simple present fouls up, present participle fouling up, simple past and past participle fouled up)

1. (intransitive, slang, idiomatic) To make a mistake, to go wrong.

   You really fouled up this time.

2. (transitive) To botch; to make a mess of.

   I fouled up question 3 of the exam.

Derived terms

• foul-up

Synonyms

• (make a mistake): mess up, **** up (vulgar); see also Wikisaurus:make a mistake
• (botch): mess up, **** up (vulgar)