1. An acronym for Pregnant with Rage, a quote from the Metalbear song "Murderlegs."
2. To be used when infuriated, angry, pissed, outraged, etc.
What is this rage I was impregnated with?
"Dudra, Metalbear totally didn't play Murderlegs at the show last night! PWR!"
"I'm totally PWR that Bambi Polar threw her White Russian at me last night!"