When evidence is presented of one's physical assault on a spouse/significant other, the act of mumbling inane excuses such as memory-loss. Named after Chris Brown's appearance on Larry King.
"I don't know how she/hot hurt, it was all so confusing. I must have ... mumblemumble."
"That's just a bunch of brownbatter. You need help."
To take something small, that doesn't quite qualify as a theft. Probably from the Danish "skæv" or the Dutch "scheef", both of which are pronounced similarly, meaning "askew, or not quite right'. To change an item's ownership without permission, but only something small and of little worth.
"I skeefed an apple off the neighbor's tree." "I skeefed some chips outta your bag when you looked away." "Don't skeef my chair when I go to the bathroom."