Typically added on to the end of a sentence of which you are verbally attacking someones character.
Included but not limited too, physical deformities, mental or social habits, any habits or hobbies and even anything the individual says or repeats time after time. Clothing and any other character traits are included.
You are a Extra Biggie Sized lookin ass nigga. (Fat Albert)
You only have one ball lookin ass nigga. (Lance Armstrong)
Damn you blazed as fuck lookin ass nigga. (Willie Nelson)
Fuck you, you raptor jesus lookin ass nigga. (Someone who looks like a raptor or jesus, but best if both combined "RARE")