"Why gods, you're absolutely right, let's mix some sprite with it".
"Great idea bobby! This will make it easier on the pallet."
"I know, let's call it Swine™".
swine can be used in any situation to degrade another person...
it basically just means theyre lower than scum plaus whatever else you want it to mean...
context plays a big part and so does the way you say it
look at that fucking swine.
that man is a filthy swineish animal...
you are the swine of all swine
you filthy swinebag!
"Dude, you have had that cold forever, is it like swine cold or something?"
"Man, this broken arm just will not heal...its so swine"