run foul of (someone or something)

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run foul of (someone or something)

To be in severe disagreement, trouble, or difficulty with someone or something; to be at odds with someone or something, especially due to disobeying rules or laws. Always look into the laws of any place you visit, or you may end up unwittingly running foul of the local police. Ms. Banks has run foul of this university for the last time. She is no longer welcome here!
See also: foul, of, run

run foul of

come into conflict with; go against.
This expression is nautical in origin: when used of a ship it means ‘collide or become entangled with an obstacle or another vessel’. Both literal and figurative uses were current by the late 17th century.
See also: foul, of, run
References in periodicals archive ?
Right from the beginning, when Henry runs foul of the local trooper as they pull up for petrol, nothing is quite right.
All he wants is a quiet life, but he runs foul of some bad guys.
ENGLAND new boy Kevin Davies may be one of football's biggest bogeymen - the striker who strikes fear into rivals and runs foul of referees.
QUEEN LATIFAH works in a beauty salon but runs foul of camp boss Kevin Bacon.
The upside, of course, is nothing to compare with the abject misery buyers face if Tiger loses it and misses the halfway axe, a distinct possibility, say insiders, if he runs foul of the long grass.