(poker) A hand where at least one player bets all of his or her chips. / (poker) A player who is all in.

Alternative spelling of knight in shining armor

(idiomatic) A person who will rescue a dangerous situation; a hero.

(transitive) to enter data by keyboarding

(of two or more people) With arms linked together; with arms around each other's shoulder or waist. / (figuratively) In collusion, in concert (with someone).

A social gathering to promote love and feelings of well-being.

Designed to be plugged into an electrical power outlet or circuit. / Able to be extended with further components in a modular fashion.

Anything that plugs into something. / (computing) A module or device that interacts with another to add a specific feature or function.

(Canada, US) behind

(idiomatic) To furnish someone with sufficient relevant information and include them in the decision-making process.