Frumpin'Bunzen': Very much like the word "Frumpy" in regards to the generallyunappealing look of something, however Frumpin'Bunzen' refers to the droopy and overall sad looking female rear end.
Yo son, I was wild'n out at the club and hooked up wit dis mad fine biddy. Too bad I aint get a look at the back cause ma's setup was straight FRUMPIN'BUNZEN'
J: "I really don't see the point in fumping!"
A: "I heard Kiki was fumped by Cedric the other day. Poor her."
J: "What an asshole. But what did you expect from a frat boy such as him..."