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Using the adjective 'indelible' with a bad connotation. When you say something is indelible, you are saying that it is indelibly retarded. As in, the subject's stupidity leaves a lasting mark on you. It can also be used as a noun to describe someone who is indelible.
You left your car running in the parking lot for two hours unattended! You are indelible.

Stop being such an indelible.
by Jeff January 30, 2003