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1.
1) A self-absorbed person who is too preoccupied with his or her agenda to have consideration for those he interrupts.

2) A person who has no regard for the affairs of others and often says things that ruin a moment.
"To just get up and walk out of the meeting like that makes him an autodick in my book."

A cock blocker.
by dwn2dv8 February 23, 2010