(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.

An Old English Sheepdog.

(chiefly UK, slang) A complete mess.

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

A cocktail consisting of gin or vodka, grapefruit juice, and a salt rim.

A batter-covered hot dog wiener, deep fried and eaten off a wooden stick.

A vegetarian hot dog, either a sausage or a sandwich made with it.

(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.

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