Does anyone know what ';Ain't got no how watchamacallit'; mean? Kurt Cobain spray painted on a wall.

Whatever the random ramblings of a heroin addict with mental instability could mean.........Does anyone know what ';Ain't got no how watchamacallit'; mean? Kurt Cobain spray painted on a wall.
I think its slang for ';I don't have ... .... What do you call it?'; A statement that says he doesn't have the thing you want, he doesn't even know what you call it or what it is... thats my guess.....