When you're having a pillow fight, and the pillow moves away from your hand mid-swing, causing you to accidentally punch the person with less than an inch of pillow between the fist and them. Normally it hurts both parties.
"Oh my god, I'm so sorry, I didn't mean to pillow punch you!"
"I was at the World Wide Pillow Fight, and someone totally pillow punched me."
"I was at the World Wide Pillow Fight, and someone totally pillow punched me."
by blankname1234 November 12, 2008