Guy 1: Argh, I can't shoot him.
Guy 2: Yeah, he's William Shatnering.
Guy 1: Yeah, wait, what?
Guy 2: He's William Shatnering.. look it up on urban dictionary.
Guy 1: Okay... homo.
Many years ago, William Shatner did a voice over for a television show featuring dramatic reenactments of situations leading to emergency calls called Rescue 911.
A William Shatner 911 now is used to refer to an extreme emergency when running for a bowel movement.