A Caucasion, white, person with strong Hillbilly, or redneck roots that dresses, and speaks with Hip hop words,and or actions and insists, he/she is Down. Any suburbanite american that pretends to be from the hood.
A white male/female comes up to you and says "Yo! what it be, cuz?"Would represent a Homebilly.
A variation of the houdini in which dip spit is used instead of saliva.
That summbitch Bobby Ray pulled a houbilly on me last night!! I thought he'd finished on my back, but when I turned around he blew in my face and yelled "houbilly!!!"