Someone who is awesome. Often subjected to ridicule by their younger counterparts. Their many years at the coal face in the real world has hardened their skins and they are largely immune to the immature jokes.
Student 1: You know that guy Richard, he's a mature aged student.
Student 2: Get the fuck out, he's awesome?!
by richilbrium August 3, 2010
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An inappropriate gap between perceived maturity level in comparison with age.
Little Johnny had a large age-maturity discrepancy. His biological age was 13 but had the maturity level of the average 6 year old.

A large polar intelligence matrix in conjunction with an age maturity discrepancy existed between Sarah and Joe. They simply couldn't get along.
by Ontological June 25, 2018
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