OwO: Hey dude could I borrow a pen or something?
UwU: I don't have a pen on me, sorry.
OwO: But you've one in your nipple pocket!
UwU: Oh, right! I forgot about it since I couldn't see it. Here you go!
OwO: Thanks, UwU!
UwU: No problem mate!
A Nipple Pocket is when someone has a flap of skin removed from their Rear End and stitched onto their chest. Since this would cover the nipple, The nipple is removed and stitched onto the front of the pocket or skin pouch.
Person 1: Can you hold my metrocard?
Person 2: Sure, I'll put it in my NipplePocket.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).