A herding dog bred in the Basque regions of Northern Spain and Southern France

(literally) An aggressive dog which guards a scrapyard or junkyard. / (idiomatic, by extension, hyphenated when used attributively) An animal or person with an especially nasty and combative demeanor.

Alternative spelling of junkyard dog

A toy dog that resembles a long-snouted Chihuahua with tufts of hair about the head and ears, tail and feet.

A herding dog native to Israel.

(mushing) One of the dogs directly behind the lead dogs, who help set the pace.

(mushing) one of the dogs directly in front of the sled that take most of the force.

(mushing) one of the dogs at the front of the team, who set the pace.

Foolish people repeatedly do foolish things.

(US, Navy, Marines) An experienced sailor. / (US, slang, dated) A sexually promiscuous man; a male sexual partner.