To play possum

Also found in: Idioms.
to feign ignorance, indifference or inattention, with the intent to deceive; to dissemble; - in allusion to the habit of the opossum, which feigns death when attacked or alarmed.

See also: Possum

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
the hospital clerk ogling your medicaid card to play possum on the
It's as if what he's saying just happened to show up in his mind that morning, as if he's never thought about any of this before, but now really wants to know: What does it mean to play possum? Is he playing dead at the top of his lungs?