Someone who used to be a jock and non committed to studying or preparing commitments in advance, but has now become nerd at a later stage in life.

Possible opposite: A person that always was a goody-two shoes but then became unravelled.
Jill was always such a procrastinator and never read up on the course material, but now she has become a Reverse Nerd even enjoys studying in her free time. .
by @ExOx April 6, 2021
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