(card games) Four cards of the same rank.

(colloquial, rhetorical question, mildly vulgar) A rhetorical question in response to a question to which the answer is an emphatic yes.

(British) A formulaic name that is substituted for that of a person whose name or identity is not known, or not relevant; typically used when exhibiting an example.

A purported inferior has certain rights or prerogatives, even in the presence of a purported superior.

(transitive with on or over) To spoil (something); to cast a feeling of gloom (over something).

(mathematics, informal) Bijective numeration in base ten.

(simile) Undoubtedly and unquestionably dead. / (simile) Very much out of date.

(derogatory) Someone who is prepared to provide comment or opinion to the media on virtually any topic, either in exchange for payment or in order to gain exposure.

(humorous) One who does not speak can be sure of not saying anything embarrassing.

(idiomatic, hyperbolic) I am very hungry; short form of "I'm so hungry, I could eat a horse."