he got it because thats what people called him after he found a dead mouse in his computer, and on a music forum the username couldn't be that long (hens the 5)
Lol dead mau-5.
I bet you retards actually say one three three seven when you see 1337, too. It's dead MOUSE. You fuckers say the $ in Ke$ha right? Same deal.
he got his name because he found a dead mouse in his hard drive so people always called him the dead mouse guy but but dead mouse was too long so he just used deadmau5