[tessellated]

For 44 years my misunderstanding of 'character actors' was that they are good at acting like other characters.

[thaumasiotes]

"High concept" is a bit of a different case in that nobody ever knows the actual meaning. It's too obvious that, in the absence of the existing meaning, it would mean "conceptually complex". It's not at all obvious why you would use a phrase meaning "conceptually complex" when what you want to say is "conceptually trivial".