If you would mean, kick out of a government position, then you can use the protest options.
For other positions, there is no option yet, although knights got the 'protest options' button whenever their estate was reduced or anything. So it was definately intended they could protest their lord, or lord their duke and so on.. There was talk about implementing a broader protest functionality in the entire feudal hierarchy but until now it hasn't been implemented.
My god, please... This would be amazing. I have been fighting a ROYAL duke for the past 2 weeks... There's LITERALLY nothing we can do, specially not exilement because the ruler barely has enough honour and prestige to BE a ruler.
