The act of physically holding your ass-cheeks with your hands and running for dear life, dignity and decency towards the nearest restroom. And why? Because you've really gotta go.
Jeremy: Man, you know, I had a hilarious time yesterday.
Frank: Why's that?
Jeremy: Because me and my girlfriend were at the mall and she had to do a Billy Run. Dammit that was funny!
Frank: HAH!
Frank: Why's that?
Jeremy: Because me and my girlfriend were at the mall and she had to do a Billy Run. Dammit that was funny!
Frank: HAH!
by THat one guy nobody knows June 27, 2010
Get the Billy Runmug. Hilly-billing denotes the activity of sitting around a campfire while consuming large amounts of alcohol in the form of cheap beer that may or may not involve the smoking of one herb or another. Other activities associated with hill-billying include making strange animal noises, awkward dances, and storytelling.
by Foster Stone May 28, 2010
Get the hill-billyingmug. Jefferson: "Damnnn girl, who was that hittin' on you?!"
Rachael: "Oh, don't worry, just some lame ass wigga-billie.."
:
Rachael: "Oh, don't worry, just some lame ass wigga-billie.."
:
by Rachael & Jefferson December 14, 2007
Get the wigga-billiemug. 
A party in which you are invited and told "everyone" is coming. Yet, when you arrive you and the host are the only ones there.
The Billy: Don't worry! Everyone's coming!
Victim: No. They're not. This is such a Billy Party, dude.
Victim: No. They're not. This is such a Billy Party, dude.
by the ginjnaninja October 5, 2010
Get the Billy Partymug. the main killer from scream. whom i fantasise about day and night. AKA MY BOYFRIEND. yeah I'm dating him fuck sidney.
"Billy Loomis?, the rat faced homo repressed mamas boy?" -said one
"Yeah not too much he's my man." -said I
"Yeah not too much he's my man." -said I
by Nobodywillknow123 June 1, 2023
Get the Billy Loomismug.