Green’s Dictionary of Slang

(US) the female breasts.

1935		A.J. Pollock Und. Speaks.
1944		Maurer & Baker ‘“Aus.” Rhyming Argot’ in AS XIX:3.
1978		Maledicta II:1+2 (Summer/Winter) 118: He gives us several terms for tits/titties (Bristol Cities, cat and kitties, Tale of Two Cities).
1997		Solar Project ‘Zeitgest’ 🎵 ...in Time [album] You wanna feel my Bethlehem steel / Mary Poppins, TNT, Bristol City / I bite into your cats and kitties.