missing a flywheel
Adjective phrase:
A descriptor applied to a person who functions well but is "not quite right in the head," as indicated by small but noticeable eccentricites of behavior to which said person is oblivious.
A descriptor applied to a person who functions well but is "not quite right in the head," as indicated by small but noticeable eccentricites of behavior to which said person is oblivious.
"Sure, Jeff is great guy, but he leaves the impression that deep down dude's missing a flywheel."