What is the word that means -"to lose against a totally inexperienced opponent"? [closed]

I am looking for a word to explain the following idea:

To lose any competition to an opponent who succeeds despite having no idea that they have overcome incredible odds against them to succeed.

Not quite what is asked for, but my first thought.

Aboyne (vb.)

To beat an expert at a game of skill by playing so appallingly that none of his clever tactics or strategies are of any use to him.

urbandictionary.com

from The Meaning of Liff by Douglas Adams

The game itself or the act of losing can be called an upset.

Merriam Webster defines it as:

an occurrence in which a game, contest, etc., is won by a person or team that was expected to lose

Cambridge Dictionaries defines it similarly:

an ​occasion when someone ​beats the ​team or ​player that was ​expected to ​win

Well to succeed despite idiocy is called pulling a Homer.

To lose to someone pulling a Homer might be called pulling a Frank Grimes.

I'm saying you're what's wrong with America, Simpson. You coast through life, you do as little as possible, and you leech off of decent, hardworking people like me. Heh, if you lived in any other country in the world, you'd have starved to death long ago. You're a fraud, a total fraud.

―Frank Grimes

simpsons.wikia.com