Sketchy bones is an individual who believes he/she can freestyle rap. For some particular reason, the Sketchy Bones believes that his/her rap is flowing freely, with intricate ryhme and rythem while everyone else is laughing at him. Also, even though he/she may be criticized after the fiasco is over, the Sketchy Bones continues on with rhymeless rap causing more laughter.
Blake: Hey Sketchy, rhyme with foreman.
Sketchy Bones: mothafuckin forey, yous a doory, try to listen to my story but you cant because im about to climb this hill, got a big bill, but im bout to steal, the mothafuckin wheel ya feel?