Darkiplier, known to be Markiplier's evil alter ego. Darkiplier is a cruel evil person when he needs to and he doesn't care for anyone else but himself. There can be times where Dark feels guilty of his actions, but he never shows it. He thinks he can outsmart Mark with his evil ways, but just never seems to succeed.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.

The vengeful version of Markiplier.

Markipliers evil side a demon look alike of markiplier that is in love with him and that is an a Elmo vampire that makes mark think of evil things and makes him act different and that makes u shiver when u see him in your dreams