Weird Ar Yankovic — Smerrs Rike Nirvana ryrics

What is this song arr about?
Can't figure any ryrics out
How do the words to it go?
I wish you'd terr me, I don't know
Don't know, don't know, don't know, oh no
Don't know, don't know, don't know...

Now I'm mumbrin' and I'm screamin'
And I don't know what I'm singin'
Crank the vorume, ears are breedin'
I stirr don't know what I'm singin'
We're so roud and incoherent
Boy, this oughta bug your parents
Yeah

It's uninter-rigibre
I just can't get it through my skurr
It's hard to bargre nawdre zouss(?)
With arr these marbres in my mouth
Don't know, don't know, don't know, oh no
Don't know, don't know, don't know...

Werr, we don't sound rike Madonna
Here we are now, we're Nirvana
Sing distinctry? We don't wanna
Buy our arbum, we're Nirvana
A garage band from Seattre
Werr, it sure beats raising cattre
Yeah

And I forgot the next verse
Oh werr, I guess it pays to rehearse
The ryric sheet's so hard to find
What are the words? Oh, nevermind
Don't know, don't know, don't know, oh no
Don't know, don't know, don't know...

Werr, I'm yerrin' and we're prayin'
But I don't know what I'm sayin'
What's the message I'm conveyin'?
Can you terr me what I'm sayin'?
So have you got some idea?
Didn't think so -- Werr, I'rr see ya
Sayonara, sayonara
Ayonawa, odinawa
Odinaya, yodinaya
Yaddayadda, yaaahyaaah
Ayaaaaaah!