nipples so sharp, they can cut diamonds. Diamonds, as you all know, have a strong covalent bond between its atoms, therefore making it one of the hardest things on earth. However, not even diamonds can withstand the magnitude of greatness in these nipples.
Person1: oh man, it sure is cold.
Person2: my nipples are so cold due to the low temperature, they are like diamond cutting nipples.
To have sex with someone thought to be out of your league; to hook up with someone universally attractive. Similarly, "cut a diamond," "cut her diamond," "diamond cut," etc.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.