"To touch, pinch, or grasp the mammary papilla in an aggressive non-sexual or sexual manner."

Something only females have. Some women love to have them played with and others don’t. Horny girls will sometimes suck on their own. To pleasure a girl, lick around her boobs and don’t touch her nipples. Then, grab her chest hard repeatedly. Next, lightly lick her nips and pinch then lightly. Then grab them again. Repeat until she arches her back to you. Then finally suck in while teasing her nip with your tongue. Some girls like it if you bite them. Next, give her oral and she’ll submit to whatever you want. Remember this only works for some girls.

A small metal tube protruding from the breech of a muzzle loading firearm, used to hold a percussion cap so that it may be struck by the hammer and ignite the powder.

The thing that can hurt and help.ex.
HURT: 1)If you are and a girl and you get punched there it hurts like hell. 2) If your a girl and you dont like guys you still get to see guys stare at you there.3) If yours are small then guys probly wont date you.

HELP: 1)They can help you get guys if yours are big. if your a girl then thats the only way they help.

When the weather is so cold that a girls nipples are erect through their bra and top, or a guys nipples can be seen through thick clothing.

This can be expanded to be 'Nipples on my feet' to mean a certain body part to be cold that doesn't actually have nipples.

In the plumbing field a nipple is a predetermined short length of pipe usually NPT(National Pipe Thread). A NPT threaded nipple can be made of almost any material and can be in sizes ranging from 1/16" to 24" NPS(Nominal Pipe Size). The plumbing nipple gets it's nickname because of it's similar function to that of a female nipple in humans and animals. It's usually a small protrusion which emanates fluid or gas.

When a woman's nipples are extremely visible through their clothing thus indicating they are wearing a cheap bra or no bra