A stumble, a trip. / An error, a blunder, especially a moral slip-up.

(idiomatic) To encounter an unexpected problem or delay.

Disdainful; haughty. / Characterised by sniffing.

A thief who steals without being noticed and without using violence.

(idiomatic) An informal check of an idea or proposal, using one's common sense or sense of propriety.

A fluoroscopic medical test during which the examinee is asked to "sniff" (quickly breathe in through the nose); diaphragm fluoroscopy.

A small restaurant serving light meals. / A counter in some other establishment having the same function.

A circular spring, having a small break in its circumference, used as a fastener; a circlip.

(idiomatic) A prank in which a gullible victim is sent off on a fruitless search for a nonexistent item.

(intransitive) To participate, as the gullible victim, in a snipe hunt.