a Latino variant of the word button, only without the enunciation of the "t". The term refers to any other application of the word "button", such as fasteners on a blouse, G-spot, etc. The refusal to enunciate the double "T" sound is most often utilized by Latino women.
Maria: Awww, I ate so much that I popped a bu'on.
Teresa: Eeeee, I'm sorry!