Term for a rapper who spits hard but won't get play on the radio due to extenuating circumstances (i.e. censorship), thus detracting a large audience from listening to the radio because they're banging his shit on their own systems instead.
Wyatt: "Yo man, you peep that new Dead Prez joint?"
Donzell: "Naw, you heard it on 93.7?"
Wyatt: "No way! They some straight radio killers, I heard that shit through the wire and popped it straight into my box."
Donzell: "That's what she said."