fall foul of

: to descend freely by the force of gravity

: to hang freely

: to drop oneself to a lower position

: the act of falling by the force of gravity

: a falling out, off, or away : dropping

: the season when leaves fall from trees : autumn

: of, relating to, or suitable for autumn

: offensive to the senses : loathsome

: filled or covered with offensive matter

: full of dirt or mud

: something foul

: an entanglement or collision especially in angling or sailing

: an infringement of the rules in a game or sport

: to become or be foul: such as

: decompose, rot

: to become encrusted, clogged, or choked with a foreign substance

: in a foul manner : so as to be foul