Definitions by Chuck Justin.

Silly Billy 

N. Ghetto slang used by black people, rappers, and porn-stars used to replace the words 'fucking retard'. More effectively used when the person being referred to is named Bill or William.

Wow Em, you should really put your clothes back on, we are at church! You are acting like a Silly Billy.

Silly Billy by Chuck Justin. January 23, 2010