Definition: Petty and underhanded legal wrangling. Pettifoggery.
The cynical among us might claim that this is general lawyering. However, those of us who have spouses who are lawyers would never suggest such a thing!
Rabulism is taking things to extremes. It’s swearing black is blue.
The adjective is ‘rabulistic’, which sounds like it would fit nicely in a righteous tirade: