An airplane that supposedly could detect oil fields underground.

Software designed for checking packets of data transferred over the Internet.

plural of sniffer dog

A police dog trained to sniff out illegal goods such as drugs or explosives.

plural of sniffer plane

Effeminate man / Environmentalist

(slang, derogatory) An effeminate man. / (slang, derogatory) An environmental activist.

(sports, derogatory) A person who idolizes star athletes.

(US, military, historical) Any of a series of devices used to detect concealed enemy soldiers by traces of effluents such as sweat and urine.

Someone who is addicted to sniffing glue. / (slang, derogatory) An extremely foolish person.