A person who always leaves first, usually by aid of his father who miraculously appears out of no where.
Said person is then called the Abbott of the group, in honour of Jack Abbott. Probably the most boring person on the planet.
The Abbott: *wispers* "I'm off lads"
Everyone Else: "What the... Did someone say something?"
2 Hours later - "Dude, where did he go? Fucking Abbott"