Schiz

At "The White Visitation" there's a long-time schiz, you know, who believes that he is World War II.

Source: wiktionary

"Who's he?" ¶ "Anthony Pervis, my pimp. Everyone calls him—" ¶ "Cadillac, right? I know him. He's a schizz." ¶ "Yeah, and he's the one who's been killing all these people with laced junk. I just found one of my friends...dead. Just now. I saw him give her the smack."

Source: wiktionary

His voice had taken a decidedly menacing tone. Manics could do damage when they got worked up. As bad as paranoid schizes. It was obvious that the power of persuasion wasn't going to do the trick.

Source: wiktionary

As they entered the room, they saw him, head resting on the makeup table, arms dangling like a real skitz.

Source: wiktionary