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One who makes excuses all the time when he/she is wrong and is unwilling to accept and admit that he/she is in error nearly 100% of the time.

Studies have shown that approximately 23% of males and 97.7% of females can be classified as excusinators.
It's nearly impossible to have a logical discussion with her because she's a prototypical excusinator - afraid to accept responsibility for her mistakes or for breaking everything she touches.
by Bill Striker II September 07, 2006
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