po-po /ˈpoʊˈpoʊ/ noun6 •A prison officer, corrections officer, prison guard. •(US, informal) The police; a police officer.Runnin’ from the po-po Runnin’ Just got my cash on Now I gotta get my dash on — 1997 •(US, informal) One's posterior, bottom, buttocks.Feet up, pat him on the po-po Let’s hear him laugh Ain’t seen a babe like this before He’s so good-lookin’, gonna have some more Feet up, pat him on the po-po — 1952 •(US, informal) Grandmother, (especially) one's maternal grandmother.And Stephanie has, since birth, lived with her grandmother – her Po-po – in this house. — 1995 •(informal) Genitals, especially the vulva.“Actually I prefer kids referring to their po-pos rather than their outer labias. Maybe I’m just old fashioned.” — 1962 •(old-fashioned) Mother-in-law, (especially) the mother of one's husband.When she was about eight years old a very sad thing happened to May Blossom. Her mother died and her “po-po” (mother-in-law) said she must go and live with her — 1906 formspo pos · po-pos