Starfleet Commander

A term used mostly sarcastically to mock someone for a mistake or doing something stupid, similar to how "genius" can be used.
It comes from the popular series "Star Trek", however as a Starfleet Commander makes little sense as a actual position, so it is usually used as a insult or by genuine Starfleet Commanders.

This also adds to the humor of calling someone a Starfleet Commander as it is a position that sounds fancy, though it does not make any sense.