What does "foul up" mean?

To make a mistake, to go wrong.

What is a synonym for "foul up"?

Common synonyms include: fuck up, mess up, anarchy, ball up, ball up, bitch.

/faʊl ˈʌp/ verb, slang

verb, slang ·Common ·High school level

Verb

1
To make a mistake, to go wrong. idiomatic, intransitive, slang
"You really fouled up this time."
2
make a mess of, destroy or ruin wordnet
3
To botch; to make a mess of. transitive
"I fouled up question 3 of the exam."

"You really fouled up this time."