1. nippons- the state of obvious protuberance of the nipples, or when ones nipples are visibly hard, due to cold weather, friction, or possibly physical arousal.
2. nippons can be compared to a man's penis when erect, commonly called a 'hard on'
examples 1. wow, you must be cold, you have nippons nipp-ons
2. I can't wear this top, you can see my nippons nipp-ons
3. I get nippons nipp-ons when I rub against you
syn-nipples, breasts,
ant-bra, smooth, not visible
related-nipples, nippies, nippy, nipply
misspellings-nipponz, nipons