nubbin

noun

1. A stub, especially a stub of undeveloped corn or fruit or nipple.
2. (informal)A small protuberance, bud, bump, or knob.

   “As an avid button collector, I have had to develop an efficient way of removing the nubbin of thread from the buttonhole.”

   “She walks to the next room, a little larger, holding a double bed. The shade is half drawn, and low light gives each nubbin of the bedspread a shadow.”

3. (euphemistic, slang, vulgar)Synonym of clitoris.