Tim Dog (real name Timothy Blair) (born 1 January 1967) is an American rapper from the Bronx, New York who rose to prominence during the early '90s with his debut LP Penicillin on Wax and the celebrated "diss" record "Fuck Compton". Tim had already appeared on songs with the Ultramagnetic MCs and went on to form a duo, Ultra, with member Kool Keith. "Fuck Compton" appeared in XXL Magazine's "Top 25 Diss Tracks of All Time" and earned Tim Dog critical acclaim from progressive hip-hop producer Blockhead who said that Tim Dog's "The Dog's Gonna Getcha" (off Penicillin On Wax) is "quite possibly the hardest song ever made."Nas shouts out Tim Dog on his track "Where Are They Now?" from his 2006 Album Hip Hop Is Dead and despite Tim Dog's beef with Dr. Dre, Eminem name-checked him on the track 'Ricky Ticky Toc'.