Muppets" and "swine" and "lefties" and "the pack"

I call my grandchildren "muppets" when they are silly.
It is an endearment.
"Pack" is a metaphor for acting together in a group like wolves do.
"Leftie" is neutral and descriptive. I am "centre/rightie."
"Swine" I would never say.
You made that one up Jim.