eurk

Person who gets left out of a three some by a durk.

Man that girl was being an eurk so she was kicked out into the rain.

billy-dicked

When a male human being sneaks up behind another (male or female) and suddenly stabs his proud penis into his unsuspecting victims...

...."a drive-by dicking"

While I was having sexual intercourse with the babysitter, my wife snuck up behind me with a strap on and billy-dicked me.