When identical twins have sex with each other.

The Ultimate Jackface is a meme from the Lostpedia Forums in which the member JoeyeoJ discovered a moment in the penultimate Lost episode "What They Died For" in which Jack Shephard, played by Matthew Fox, looks directly at the camera. The original poster continued to post various pictures, including Lost screenshots, in which the face is inserted into the shot. Sometimes text is included and sometimes they are in a multi-panel form like a Dinosaur Hed, a similar meme from the Lostpedia Forums. Other members of the forum have also taken to making these. The name references the various faces that Matthew Fox makes while playing the character of Jack, which have become known as Jackfaces.

An Ultimate Dude is a male who dresses as though he is a seasoned mixed martial arts (MMA) fighter. His attire usually consists of the following: A TAPOUT t-shirt, camoflage pants, beenie hat, goatee. He can often be spotted driving in his large American model pick up truck which sports a large TAPOUT sticker in the rear window.

In Kpop, a bias is a member of an idol group that is your favorite. An ult bias, or ultimate bias, is your favorite bias out of all of your biases

To give everything you have to save someone or something that you hold most dear. Requires that you give yourself, in order to provide them sanctuary.

Is an game of tag played for a minimum of a one month period.

A very attractive and extremely special person.