KANYE WEST AIR RAGE-OUS

Like Morris the Cat, Kanye West is a finicky …flier.

A spywitness told the NY Post the ragin' rapper threw a major hissy at LAX on his flight back to NY after the Grammys.

But he and his assistant were seated in business class instead of first - something you don't do to the butt of South Park  'gay fish' jokes.

"He wanted to be bumped up," the witness said.

After much hue-ing and some crying, the rapper was finally reseated.

And thankfully not next to Taylor Swift.