Flipyap

Flipyap is a Grunt mentioned by another Grunt in a long comment that can only be heard with the IWHBYD skull.

"You killed Flipyap! Or Yapflip, was he... It was Yapflip... No, Flipyap is his brother. Don't tell me I don't know Flipyap! Flipyap and I went to Nipple Academy together! And.... and now he's dead..."

Flipyap and the Nipple Academy are mentioned by Bungie for humorous purposes only.

Trivia

 * The quote can be heard here.
 * There is also a chance with the IWHBYD skull on that you can, overhear grunts talking, saying, "Cover me, I'm going in." "I'm not going to cover you, it's your fault Flipyap got killed."
 * He is the brother of Yapflip, according to his friend.
 * Flipyap is one of the most popular and well known Grunt characters in the halo games.

After so many have found him in Halo 3, Flipyap is the most famouse character in Halo series who isn't a main character.