Definition of "bazonga"

[…] you know that two-thirds of the jerk-offs who buy the magazine in the first place are only looking to see if the chick with the big bazongas is in Foto Funnies again but what the hell […]

1972, Doug Kenney, “The Miracle of Democracy”, in National Lampoon, page 52

Oh, well. She's got... great... casabas. […] Well, you know. Melons. […] Hoo-has? Honkers? Hooters? Headlights? Uh... tatas? Teeters? Tweeters? Tom-toms? Tetons? […] I'm trying to say it. Uh, meatballs. Mangoes. Cream pies. Cupcakes? Uh... bangers? Bouncers? Bulumbas? […] Bazongas? Breasts! I said it.

1993, Quantum Leap, season 5, episode 14, spoken by Al Calavicci (Dean Stockwell)

The guy next to him poked him in the ribs and said, “Check out the bazongas on this one!”

2012, Johnny Meah, Risk: No Eulogy for Tin Soldiers, page 40