This is a customized version of the word Hillbilly, but used in reference to the people living/born in Kingston, Jamaica.
A Kingbilly is one who is so closed-minded, backward and antiquated in thought/ideas in general that they border on 'being dim'.
The word is generally used in insulting terms, as to refer to a person as unsophisticated and backwards, or to say you come from the 'ghetto/poor/country' areas.
"Jack is living in the 60s or something, he's such a damn kingbilly"
"How can a black person not like black people? What a fu%^ing kingbilly"
"Wow, Jen is definately nowhere near bright, she's a border kingbilly"
"You ARE NOT coming with me to ClubZ looking like a kingbilly"
"You live in Tivoli? You're practically a kingbilly"
A king willy is when you put a bump of coke in your pubes and get a girl to top you off, if she can deepthroat your schmeat successfully and reach the bump with her nose then she gets free coke.
Bro im telling you, if she can do a king willy then she is thr girl for you.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.