Green’s Dictionary of Slang

biatch n.

also beatch, bee-ach, beeatch, bee-otch, beeyatch, beitch, bia, byotch
[deliberately exaggerated pron.]

(US black/teen) a var. of bitch n.1 ; can be used to refer to a male or a female, a friend or an enemy, as an excl. etc.

[US]Too $hort ‘Cusswords’ [lyrics] Too $hort, don’t say it tonight, beeatch.
[US]Da Bomb Summer Supplement 2: Biatch (n. & voc.) {Mildly vulgar} bitch. This term is used among friends to replace a name.
[US]College Sl. Research Project (Cal. State Poly. Uni., Pomona) [Internet] B-ei-ei-ich (noun) Bitch. [Ibid.] Beeyatch (Byach—pronounced ‘BEE-YOCH’) (noun and vocative) 1. An exclamatory response to a girl that dissed ya or used to describe a chick that ain’t worth mugging with. [...] 2. (noun) An attractively fine lady, especially with an attitude. [...] 3. (noun and vocative) It’s used to dis everyone (its not aimed towards women); a jerk. 4. (noun and vocative) Said to a friend when they tell you something outrageous.
[US]Source Nov. 137: Ever since the cleansing ceremony [...] B-Real cut down on the beatches-n-booze.
[US]Ebonics Primer at [Internet] biatch Definition: woman, one that is currently dating the person speaking Example: Lacretia my biatch, so git yo own ho diggity ho bag. [Ibid.] be-i-itch Definition: a homie that be trippin’ or illin’ Example: You is a be-i-itch!!
[US]Eble Campus Sl. Fall 3: crack-whore – person unworthy of respect or esteem. Also bee-otch.
[US]‘Touré’ Portable Promised Land (ms.) 161: We Words (My Favorite Things) [...] Booshit. Summbitch. Beeatch. Shimit. Gotdamn.
[US]Eble Campus Sl. Nov. 1: bia – from biatch.
T. Fey Mean Girls [movie script] ‘Trang Pak is a grotsky little byotch’.
[US]T. Dorsey Atomic Lobster 22: I’m taller than you, bee-ach.