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3.
affectionate term used when ever... preferably screamed at the top of ones lungs. anyone named eric, is reffered to as oh billy.
*OH Billy!
- where have you been all my life
* in your bum bum.
by bogart March 09, 2005
 
1.
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
 
2.
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