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1.
n. Synonymous with "joint", a Billis is a marijuana cigarette usually used for recreation. The term is believed to have originated from Bidford, and it's use is only used within a small area around Bidford, making it a great secvretive word for a joint!
Yo, man, Can you pass me that Billis?
Nar, man, this is a nubby!
by Rhemez 4 Chremez June 11, 2006
 
2.
The most beautiful name in the world.
A very gorgeous girl.
Unexplainable personality.
Knows exactly what too say,always.
Does whatever,whenever.
Billi.
sl:why are you DOING THAT?!

bd:because, i'm Billi,thats why.
by Shadowlove00 June 26, 2010
 
3.
Billi is usually for a girl from europe, croatia, uk, somewhere around there, she usually likes to blaze, party, drink, play rs, and loves rock n roll.
Yo billi let's go out and blaze, hi billi let's party
by Hotchica4u May 03, 2006
 
4.
adj-term used to define any behavior, look, person, activity, outfit, food, car basically ANYTHING that is weird, out of the ordinary, completely ridiculous, or just down right wrong.

also can be a way to let friends know you are hammered.
"I can't believe you made out with a gay guy wearing a banana suit last night, you were so billis."

"the person driving that car is being so billis right now, they just cut me off."

"i just took mad shots, i am so billis."
by virgin3 June 21, 2009