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15.
A person with a lot of swag, who always dresses fresh and stays fly.
Girl: That guy has a real Billy style.
by Davister28 June 15, 2011
 
16.
A freak at skating. A Billy loves beanies knitted by his grandma and he is normally good at everything. A Billy is a brunette and has a perfect body, tanned, fit, well-built, muscular and is just pure sex appeal all over. A Billy has a amazing personality and makes the an excellent boyfriend. A Billy likes making innapropriate jokes and actions whilst in public. A Billy is extremely affectionate and will always know how to make someone smile. Billy is someone you know you want to spend the rest of your life with. Once you meet a Billy you will never want to leave him. Likes bubbles
'I saw this Billy down the street the other day'

'omg did you get his number? Make sure you don't let him get away!'
by potatooeesss July 30, 2012
 
17.
The term "Billy" is mainly used among the LGBT community to describe the act of fellatio. "Billy" is a popular first name given to Caucasian males at birth, coupled with the stereotype that Gay White Males (GWM) perform oral sex better than Gay males of other ethnicities.

It is a spin-off of the term "Becky."
Gay Male: Do you wanna give me Billy?
by I Love Getting Billy August 20, 2010
 
18.
A man with an incredibly small penis, he never quite hit puberty, but he still likes to act as if he has a big dick. He insults others to make himself feel better, and more unstable than Lindsey Lohan on a drug kick. He doesn't realize that his friends don't even like him anymore, and he watches more gay porn than Justin Bieber. He still pretends that he has an interest in woman, but in reality, he looks at, fantasizes about other men's schlongs, wishing that one day, his could be that big. He masturbates so often, everyone is curious as to how he would, his hands would strangle that tiny thing! He never really hit puberty, so he has almost no body hair.
"That guy last night was totally a Billy"

"Was it really that small?!?"
by BillyCamillo May 15, 2014
 
19.
a slang term used to describe the mans penis when in classrooms, around women, moms, and girlfriends.
Dude 1: man, i beat the hell out of Billy last night. He stood up to me so i pounded him into submisson and made him throw up.

Girl: whos's Billy?

Dude 2: you'll find out soon enough ;)
by Schlong Mydong January 08, 2013
 
20.
The shortened Cockney rhyming slang for Knickers... Shortened from Billy Vickers.
I got some new Billy's for Christmas.
I'm gonna wear my sexy Billy's in case I pull.
by MissSkates January 04, 2012
 
21.
Another word to describe money, cash, bills, or guap. Used mostly when your wallet is overflowing with big bills.
Dude dinner is on me i got straight billies in my wallet

dude i just put in 50 hours last week, my wallet is gonna be full of billies
by gettinitwet24/7 September 01, 2010