(aviation) Initialism of airplane nose down.

(US, slang, law enforcement) A police patrol car. / (US, slang, by extension) The police, a police officer or the clothing they wear.

Alternative form of black-and-white (of an image, a video, etc: in black, white, and perhaps shades of grey, rather than in colour)

Alternative form of plug and play

Alternative form of R&R

Alternative form of carrot and stick (more common in UK than in US)

A depiction of a human skull and two crossed femurs (thighbones), a symbol of death traditionally used on the Jolly Roger pirate flag, but now as a warning of toxicity or other dangers.

A genre of popular fiction in which characters with an affluent lifestyle have frequent explicit sexual encounters.

Abbreviation of dilation and curettage.

(medicine) A surgical procedure in which the cervix is dilated and the lining of the uterus is scraped with a curet.