1 definition by Jeffy Dahmer & Nanook
When you are in the shower and you feel the need to stick a toothbrush in your anus (bristle end first) and jump around yelling, "I have a tail, I have a tail."
Man says "Hey honey guess what i just did."
Woman " I don't know. What?"
Man "I just did the william beagle."
Woman " I don't know. What?"
Man "I just did the william beagle."
by Jeffy Dahmer & Nanook April 16, 2007