Elongated, saggy breasts most often found on older women.
Man, look at Linda's floor dusters swinging away while she walks.
by TFT152 June 28, 2011
Breasts that are so large that they'll end up saggin below the knees - dusting the floor.
Yeah, Amber's got huge knockers, but when she turns 40, and has had a few kids I'll bet they'll be floordusters.
by Leif April 04, 2005