(chiefly US, Canada) The main business part of a city or town, usually located at or near its center. / (US, slang) The female genitalia. / (slang) Heroin.

One of the six traditional counties of Northern Ireland, usually known as County Down. / A surname.

a street leading off Whitehall in Westminster, London containing the residences of the Prime Minister and the Chancellor of the Exchequer / (metonymically, by extension) the British government

(US) A Friday on which office workers are allowed to dress more casually than usual.

To insist, demand, or refuse with finality. / (informal, literally) To make a vehicle go faster; accelerate.

(transitive) To hit someone with a car or other vehicle and injure or kill them. / (transitive) To criticize someone or an organisation, often unfairly.

(idiomatic) To wait; to stop pursuing, stop fighting, or relax from a heightened readiness posture. / (transitive, intransitive) To withdraw or retire from a position or from a team.

(idiomatic) Thoroughly practiced, rehearsed, or understood; mastered.

(intransitive) To become less excited, intense, or angry. / (transitive) To cause to become less excited, intense, or angry.

(physics) A quark having a fractional electric charge of -1/3 and a mass of about 4 to 8 MeV. / Symbol: d