Green’s Dictionary of Slang

bub n.4

also bubb
[bubby n.1 ]

the female breast, usu. in pl.

[UK]R. Morley ‘Flashey Joe’ in Farmer Musa Pedestris (1896) 97: Your panting bubs and glist’ning eye / Just make me love you like the divil.
[UK]Hotten Dict. of Modern Sl. etc. (2nd edn).
[UK]Sl. Dict.
[UK] ‘New Year’s Day’ in Pearl Christmas Annual 62: Her bubs were intense, / Her arse was immense, / And her cunt quite too utterly utter!
[UK]‘Walter’ My Secret Life (1966) VIII 1647: Haven’t I a foine shape [...] there, feel me bubbs — look at my small waist.
[Ire]Joyce Ulysses 61: He looked calmly down on her bulk and between her large soft bubs, sloping within her nightdress like a shegoat’s udder.
B. Breuer Daughter in Legman (1968) I 145: I want a girl with big bubs and plenty to hold onto.
[US] in G. Legman Limerick (1953) 54: The pride of his life / Were the tits of his wife—One real, and one India-rubber bub.
[US]E. Hunter ‘The Beatings’ in Jungle Kids (1967) 134: Her bubs all spilling out the front of her dress.
[US]J. Thompson Texas by the Tail (1994) 165: Studs were always buying rubber bubs [...] so that they could pass for dames.
[US]J. Thompson ‘Sunrise at Midnight’ in Fireworks (1988) 184: The twins, Bub-Bub, seem to tug me forward into naughtiness.