dude #1: yo man, did that guy just walk into a pole?  dude #2: yeah man, that foo pulled an erwin 
pulling an erwin is when someone walks into a pole, or any type of solid object that you may walk into
"dude #1: yo man, did that guy just walk into a pole?  dude #2: yeah man, that foo pulled an erwin " What is the definition of "erwin "?