Coyne and Scurlock's relationship ended in March (14) when the singer objected to public comments his drummer had made about the musician daughter of Oklahoma Governor Mary Fallin, who is a friend of the star's.
Scurlock was one of many people upset by an image 27-year-old Christina Fallin posted online of herself wearing a Native American-style headdress, and he took to social media to call the photo "disgusting", adding, "A headdress is a symbol of respect which is earned".
Coyne wrote a message of support for apologetic Fallin online, and promptly fired the drummer, who then took his claims of verbal assault against the singer to Pitchfork.
In a new Rolling Stone interview about the drama, Coyne has called his ex-bandmate a "compulsive pathological liar", insisting that the Fallin incident wasn't the only reason Scurlock was let go.
He says, "He just was not very significant to us. And all the things he's saying about the reason he was fired, it's all just made-up lies. He knows we struggled with him for years and it didn't occur to us that it seemed that significant. I don't even use the word 'fired'. He just doesn't play drums with us anymore - that's the way I'd put it... We never wrote songs together. He was a guy that we thought was, I guess, good enough technically that could do stuff in performance. But we know a lot of musicians, so it was not that big of a deal."
Coyne adds, "I don't like having any hate go anywhere. I absolutely loved Kliph, but he had a lot of problems with being immature and he would just hate everything. Anybody that wants to look at what he does with his Twitter, he usually is hating people. And I never thought about it very much.
"It was only brought to my attention because I'm friends with Christina (Fallin)... and he's an a**hole bully... and I'm like, 'Hey dude, that's our friend. Why are you doing that? Why are you just being a typical cowardly Internet hater?'
"Anybody who knows him knows what kind of a hateful person he is. I mean, anybody that looks at his stuff could see that most of the bands that we would play with, he despised them... If you're going to be that hateful, you can't be associated with the Flaming Lips... After the Christina thing, people brought it to my attention, and it's like, 'Dude, he says bad s**t about all of our friends'."
And, as for the drummer's accusations of assault at the hands of Coyne, the singer states, "It's a joke. Anybody that knows him knows what a hateful pathological liar he is. I don't have to defend anything that Kliph says.
"Kliph has been with us since, I think, 2000. Before that, he's been in about 30 other groups, and he's quit all of them. If I was so bad, why didn't he quit? He never quit once. I've been in the Flaming Lips for 32 years now. (Bandmate) Steven's (Drozd) been in the Flaming Lips since 1990. Michael's (Ivins) been in the Flaming Lips for 32 years. Our manager's been our manager for almost 30 years now. We've been on Warner Brothers (record label) since 1990. Nobody else in the world knows that I'm a horrible person except for Kliph Scurlock. He must be a f**king genius from outer space!"