po-po

po-po · noun¹

From various words by shortening and reduplication. The "posterior" sense may be reduplication of the initial syllable of that word, with modification of the vowel according to its spelling. Compare German Popo (“bottom”) from Latin pōdex (“anus”). The "police" sense may come from either the initial syllable of police or the initial letters of the words police officer. Compare PO.

po-po · noun²

From Chinese; see po po.

First known use, by meaning

• from 1950s One's posterior, bottom, buttocks.
• from 1990s The police; a police officer.