thinglet Share definition Flag A super thin singlet that sits between the nipples to show more chest. Is commonly worn by bodybuilders and homosexuals. "That dude's thinglet is so thin that he could also use it as dental floss". thinglet by MadDogMadison March 27, 2016 0 0 Get merch Get the thinglet mug. Buy Now — $32.95 See more merch