A general exclamation, demonstrating mostly dismay or displeasure with a situation. See also Fuck a pig with a stick
*as your car flies off a cliff* OH BILLY!
by Mister Man the Guy September 21, 2004
code name for a "hot chick"
If you're out with your wife and you see a "hot chick" you can turn to your buddy and say "oh billy at 2 O'clock"
by schoch March 14, 2010