Green’s Dictionary of Slang

(orig. Ulster) the female breasts.

1988		Viz Oct./Nov. 13: How lads, check oot the baps on that wench!
1999		Roger’s Profanisaurus 3 in Viz 98 Oct. 14: flat as a kipper’s dick adj. Descriptive of unleavened baps.
2005		P. Howard Curious Incident of the Dog in the Nightdress 122: Brown hair, amazing eyes, huge baps.
2013		T. Black Ringer [ebook] n.p.: It doesn’t get up this time, which gives me an eyeful of the wee baps it’s got in one of those push-up bra things.
2017		Times 2 Feb. 🌐 You realise that when people talk about liking the hot baps they don’t mean a bread basket?