The process of bringing both nipples together as one. This can only be achieved by a very large breasted women.
When your womans breast are so big you can press both nipples together and lick or suck those babies at the same time. She loves it when I pull out those 36DDD and give her the Double Nipple Licker.
One who likes to tickle nipples. This can also be used to call someone a clown, jokster, goof, crazy, etc.. Some people you can just tell by their appearance that they are nippleticklers. Others it takes a little more research to discover this.
"Dude did you just see that chick? she was freakin hott."