Merriam-Webster Dictionary is the master of social media sass. Amid backlash that Jodie Whittaker was cast as the 13th “Doctor Who,” the first female to lead the sci-fi series, the online dictionary tweeted a friendly, six-word reminder that there was no reason to criticize the casting.

“‘Doctor’ has no gender in English,” the dictionary simply tweeted. Those who celebrated the casting of the first female Doctor praised Merriam-Webster’s tweet and commended their shade with gifs. “Merriam-Webster is the best,” author John Scalzi wrote, while Rachel Talalay, who has directed several episodes of the British television series, thanked the dictionary. “‘Director’ has no gender either.”

Whittaker was revealed as the 13th Doctor over the weekend. BBC announced at the end of the Wimbledon men’s singles final that Whittaker would be the first woman to take on the role of the mysterious Time Lord. Whittaker told BBC News that it was “overwhelming, as a feminist” to take on the role. “It’s more than an honour to play the Doctor. It means remembering everyone I used to be, while stepping forward to embrace everything the Doctor stands for: hope. I can’t wait.” She added, in response to criticism, that it was an exciting time for the series:

“I want to tell the fans not to be scared by my gender. This is a really exciting time and Doctor Who represents everything that’s exciting about change. The fans have lived through so many changes, and this is only a new, different one, not a fearful one.”

Many on social media agreed that the change was long overdue, however, not everyone was as enthusiastic. Some saw it as a “politically correct” move while others believed the Doctor should only be male. Others, nevertheless, applauded not only the first female Doctor, but the decision to cast Whittaker in the lead role.

Other actors who have played the Doctor include Matt Smith, Paul McGann and David Tennant.

Of course, this is far from the first time that Merriam-Webster has unleashed their sass on the internet. They have trolled politics multiple times, including debate faux pas, Trump’s tweets and Ivanka Trump “complicit” statement. They have also had fun by mocking viral fails, such as United Airlines’ PR nightmare—tweeting the definition of “volunteer” amid the debacle.

As for who will be on their “trolling” list next—only time will tell.

Take a look at some of the responses to Merriam-Webster’s sassy “Doctor Who” tweet below:

Social Media Reacts to Merriam-Webster’s “Doctor Who” Tweet

What are your thoughts on Merriam-Webster’s response to “Doctor Who” critics? Do you agree with the show’s decision to cast Jodie Whittaker as the first female Doctor? Sound off in the comments section below!