nisbetting 

To put questions on a test that have not been discussed for at least 2 years, and expecting one's students to know the answers.

I failed that test the other day, since my teacher was nisbetting.

nisbetting by angrysuperhawk November 14, 2014

Nimbletting 

To mumble incoherence to make one sound smart but still comes off as stupid.

Also used as a verb for making obvious mistakes from others’ point of view but not by the one nimbletting.

I can’t believe Josh is nimbletting through this entire conference call

Nimbletting by Jack Cole Ero March 23, 2022