Green’s Dictionary of Slang

1. a child.

2000

Ebonics Primer at www.dolemite.com 🌐 boo Definition: child Example: Example When my lil boo gets back he’s got an ass whoopin comin.

2. (also boo-piece, boo-thang, boo-thing) a sweetheart, a loved one; a close friend; thus as term of address.

1990		Grand Daddy IU ‘Sugar Free’ 🎵 Yo, boo, I like you, but I like others too.
1997–2000		Da Bomb 🌐 4: Boo: A girlfriend or boyfriend.
1998		Eble Campus Sl. Nov. 1: boo-piece – boyfriend or girlfriend.
2000		Eble Campus Sl. Spring 2: boo-piece – boyfriend or girlfriend.
2002		Teen Lingo: The Source for Youth Ministry 🌐 Boo A close person to you. your best friend or your boyfriend/girlfriend. ‘Dat’s my boo your messin’ wit!’.
2010		A. Steinberg Running the Books 6: Inmates exchange intrixcate handshakes and formal titles: OG, young G, boo, bro, baby boy, brutha, dude, cuz, dawg, P, G, daddy, pimpin’, nigga, man, thug thizzle, my boy, my man, homie.
2012		C. Eble (ed.) UNC-CH Campus Sl. 2011 1: BOO THANG — someone in a flirtatious relationship: ‘Nick is Leah’s boo thang, but Dante is her boyfriend.’.
2012		‘Dutch’ ? (Pronounced Que) [ebook] You okay, boo?
2014		Wiley ‘Hollow Da Don’ 🎵 And I can take his boo and tape her nude / Made a movie out that pussy, yeah, that got taken too.
2014		C. Eble (ed.) UNC-CH Campus Sl. Spring 2014 Fall 1: BOO — significant other: ‘That’s my boo in the green dress’ (Also BOO-THING).
2016		Wash. Post 14 June 🌐 Maybe your boo stayed home, wasn’t feeling it, but is blowing up your phone with sweet texts, trying to make sure you don’t stray.
2020		S.A. Crosby Blacktop Wasteland 84: ‘That’s good, boo [...] Love you’ [ibid.] 200: She [i.e. a waitress] came strutting over [...] ‘What ya need, boo?’ she asked.
2020		G. Krauze What They Was 87: Shut up Boo you’re blatantly into it as well.
2022		J. Hannaham Didn’t Nobody Give a Shit 42: She sighed for her boo, his long bid.