George Conway appears to have come up with a brand-new scathing nickname for President Donald Trump.

The conservative attorney and frequent Trump critic, who is married to White House counselor Kellyanne Conway, on Thursday repeatedly called his wife’s boss “Deranged Donald.” It seemed to have stuck, with the hashtag #DerangedDonald trending on Twitter.

Conway used the mocking moniker in a series of tweets in which he criticized Trump and also took a swipe at widely watched conservative cable network Fox News, whose prime time hosts staunchly defend the president: