stumper

One who or that which stumps, in any sense.

In cricket: A fielder who stumps a batsman out, that is, one who, with ball in hand, puts down the wicket, if the striker, failing to hit the ball, is out of his ground.

A wicket-keeper.

One who stumps.

A boastful person.

A puzzling or incredible story.

One who stumps, or speaks, or orates, as a politician.

A difficult puzzle or problem.

A boastful person.

a particularly difficult or baffling question or problem