Adj. the name given to someone who is confused in any situation.
When her teacher told her to explain the meaning behind a coin, the studentthought she was supposed to explain the features of the coin. She was being a Chanatar in that instance.
Crashing a vehicle. Derived from Commander Chakotay's notorious inability to get in a shuttlecraft without crashing it or otherwise blowing it up on Star Trek: Voyager.
"You keep speeding like that, you're gonna be pulling a Chakotay sooner or later -- if the cops don't catch you first."