In the One Direction documentary "This Is Us" when referring to his past relationship with Taylor Swift, Harry Styles turns to the term "pain in the ar**."

After breaking up in January it seems the ex-couple is set on getting revenge on one another. Taylor wrote the hit song "I knew you were Trouble" about Harry Styles and it is also rumored that her new song "Revenge" is about the British singer as well, according to Entertainment Wise.

In a snippet of her new song "Revenge" Swift is heard singing, "Gonna give you what you gave to me... Make you so feel so B-A-D, break you, make you sorry."

It seems Styles is done playing nice, the scorned ex has had enough. In the One Direction documentary he reportedly refers to their romance as a "pain in the ar**."

Styles stated, "I haven't met a girl yet who I'd want to even think of getting serious with."

He went on to say, "I think I've been unlucky in love so far. But then, I haven't met anyone who's made the Earth move for me."

When the film sees the light of day it has been reported that Styles asked to have all footage related to his relationship with Taylor Swift removed from the documentary.

"He is over Taylor, so whatever she does, is what she does! He isn't even bothering to care about the songs she sings about him. He is over her."

In the documentary the band member describes the type of girl he wants, "I'm longing to meet someone who really inspires me and makes me really want to spend time with them."

Styles have previously dated model Cara Delevigne, singer Lily Halpern, and much older television personality Caroline Flack.

Taylor Swift fans can catch the star at the Billboard Music Awards on May19th where she is nominated for 11 awards.

To hear the snippet of her song check out the video below.