Taylor Swift drops expletive in response to One Direction's appearance at the MTV VMAs

2013 MTV Video Music Awards - Show
Taylor Swift, center left, and Selena Gomez sit together at the MTV Video Music Awards on Sunday, Aug. 25, 2013, at the Barclays Center in the Brooklyn borough of New York. (Photo by Scott Gries/Invision/AP)

By now, Taylor Swift's ex-boyfriends know not to mess with the singer, who typically takes the more vengeful route of debriefing after a relationship by penning catchy, chart-topping, breakup tunes that haunt them relentlessly.

Taylor Swift on the red carpet at the 2013 Video Music Awards at the Barclays Center in Brooklyn. (AP Photo)

It seems One Direction's Harry Styles has and continues to lack immunity to Swift's ways. The pop artist previously made fun of the tween heartthrob by mimicking his British accent during her "We Are Never Getting Back Together" performance at this year's Grammy Awards. The story at Sunday evening's VMAs was not the artist's pointed speech as she accepted the best female video award for "I Knew You Were Trouble."

"I also want to thank the person who inspired this song," she said. "Who knows exactly who he is, because I got one of these. Thank you so much!" the starlet added while Styles looked on from his spot.

Swift, who was seated next to bestie Selena Gomez, was caught on video and later captured in a viral GIF, mouthing off during One Direction's presentation. In it, she appeared to be muttering, "Shut the f-ck up," after One Direction's Zayn Malik quipped, "The best fans are in New York!"

Watch below.