(idiomatic, euphemistic) A recovering alcoholic, especially one who is a member of the organization Alcoholics Anonymous.

(law, Australia, Britain, Hong Kong, New Zealand, Canada) A barrister on the opposing side of a dispute; a member of opposing counsel.

(informal) A person with whom one has only a very casual and superficial friendship.

Alternative form of fair-weather friend.

(Internet slang) A suggestion that an individual could learn something using an Internet search engine, rather than asking others.

In a civilian aircraft: a transponder that responds by sending a code identifying itself.

(idiomatic) One who is friendly, helpful, or available only when it is advantageous or convenient to be so.

An animal that is regarded as a good friend, usually a dog or a horse.

(slang) The penis.

An affectionate term for a dog, or dogs in general.