Or the Holy Spirit, depending on which translation one likes.

What is that sin supposed to be? Something like:

"You Holy Ghost you, you are nothing but a spook! A birdbrained spook!"

I remember this from a post a while back, I think the only way to blaspheme the Holy Spirit, (the unpardonable sin) is if you have personal knowledge that God exists (as Satan did) and rebel against him. but then mpartyka claimed if you were a 'true Christian' who has rejected God you have done this, others pointed out that to blaspheme the Holy Spirit you must give Satan credit for something Jesus did, more & more conflicting dogma.

Here's a thread about it