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1.
When one achieves a lower grade than a 90% in a class or on an assignment. As a noun it is Rachel Failure. In Past tense, Rachel Failed
Katie: I'm so stoked, I got an 87%!
Kieran: You still Rachel Failed.

Kieran: I have a 76% in Math!
Katie: Whoa, you're really Rachel Failing.
by Mohammed Abdul Jabar November 12, 2010