plumber pants Share definition Flag Unattractively low rise pants which reveal an unpleasant view for everyone around when the wearer bends over. I really didn't need to see that guy's plumber pants. Excuse me while I vomit. plumber pants by Smartie770 February 21, 2009 0 0 Get merch Get the plumber pants mug. Buy Now — $32.95 See more merch