There are the "Awesome McCoolname" and "Fail O'Suckyname" twin tropes, but those refer to ACTUAL names or nicknames, not made-on-the-spot ones, so they don't cover it.Neither do the "Mr Exposition", "Captain Obvious", and their cousins, but they seem related.
It may be considered a derivation of those, tough. By the very existence and widespread knowledge of the trope, it can be misapplied in a sarcastic way.
It may be considered a derivation of those, tough. By the very existence and widespread knowledge of the trope, it can be misapplied in a sarcastic way.