Top Definition
1. a Snobbishly aloof person.
2. High-class; exclusive.

The origination of this is from an episode of the simpsons where Bart defends Lisa from a student at a high class private school:
Bart: "Back off Jack!"
Rich Kid: "It's Jackington."
Take a look at that jackington double-parking his benz.
by Kevin M March 16, 2005

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