Noun
A trap which can easily be avoided by a competent person, and thus proves the incompetence of anybody trapped by it.
To show he doesn’t do his fair share of work, I’ve set him an elephant trap. If he falls in he’ll look like a clown.
(chess) Often in the form Elephant Trap: a faulty attempt by White to win a pawn in a popular variation of the Queen's Gambit Declined, which is generally only effective against inexperienced players.
Source: en.wiktionary.org