The smart way of saying mentally retarded, defective, special, etc.
Garrison: Obama is a pretty good president!
Harrison: You're mentally inept
by Faggotboywithsmalldick February 20, 2016
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mentally stupid, foolish, and especially dumb, in the head
This teacher is so mentally inept, how is he still here?
by Progomotion December 30, 2022
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