BillD, our family used "faunching" all the time when I was a kid. It is related to grousing, only rougher and without the whining, and is fairly likely to involve stomping around or slamming doors. More active (and more noisy) than pouting.
It can also indicate a pushy eagerness.
"What is he faunching about?"
"He's faunching to get going and the car isn't loaded up yet."
In college I was informed by a friend that there was no such word; I looked it up and the dictionary identified it as "archaic Scottish" though it was in active use in Kansas and Oklahoma (in our family anyway) in the 50s, up to the present.
Another word I love is "formicate" which means to swarm like ants.
LiztheSqueak, I love "dollop" as an insult. Our family was not permitted any foul language or namecalling. But you can call your brother a "crouton" or a "diphthong" and what can the grownups say? And someone who has been called a "murmuring diphthong" KNOWS he has been insulted!