(idiom) full of holes; riddled with contradictions; used to describe an argument, theory, or story that is inconsistent and not at all rigorous

To feign a weakness or opening in one's defense in order to trick an opponent into attacking, typically in martial arts or combat.

To feign a mistake or leave an opening on purpose to lure an opponent into a trap.

To reveal a flaw or a hole in a story; to let the cat out of the bag or accidentally reveal the truth.