Wërjñatdhaçfafët
Somebody who thinks that they have the answer to something, and are so sure of themselves they publicly share they're solution. They would then get told something that they hadn't thought of about in they're solution and lose all the confidence they had prior to them getting told. They would not act stubborn about it and start arguing, but just pretend like the encounter never happend while silently adding the newly learned information. Also it's 1, not a real word, and 2, pronounced "wErniaTthachafEt"
John was known to be a wërjñatdhaçfafët due to the fact that literally every time he thinks of a solution for something, Tom makes a bruh moment out of it and adds 2X more stuff to the solution without breaking a sweat