afoul of 
/əˈfaʊləv/ adverb
/əˈfaʊləv/ adverb Meaning:
fall/run afoul of
chiefly US : to get into trouble because of (the law, a rule, etc.)
▪ After leaving home he fell afoul of the law. [=he got into trouble for breaking the law; he was arrested for committing a crime] ▪ an investor who has run afoul of stock market rules
▪ After leaving home he fell afoul of the law. [=he got into trouble for breaking the law; he was arrested for committing a crime] ▪ an investor who has run afoul of stock market rules
