Green’s Dictionary of Slang

(US) the female breasts.

1985		J. Brasil Escape from Billy’s Bar-B-Que 67: I was afraid of Puerto Ricans because they liked women in tight skimpy dresses with their bazoombas half uncovered.
1992		M. Frayn Now You Know 247: Now there’s bums and bazoombas tumbling around on top of everything else.
2001		‘Rue DeDay’ ‘A Girl, Bazoombas, And Rabbits’ at www.teemings. com 🌐 Debbalina also had big, round bazoombas. You wouldn’t believe a girl could have such big bazoombas. Everywhere she went people would stare and say ‘Now there is a girl with big bazoombas’.
2008		T. Sandlin Rowdy in Paris 198: Their boobs were more realistic than the bazoombas you find on American blowups.