Definitions by Dr. Falken

ba-donka-donk 

(adjective)
something that is favorable because of its exaggerated mass;
"ba-donka-donk" is actually an onomatopoeia representing the cartoonish sound produced when something large is in motion

Fat Albert has quite the ba-donka-donk gut.

ba-donka-donk by Dr. Falken January 8, 2004