Jealous much? Donald Trump is stewing over the fact that Greta Thunberg won the title of “Time Magazine’s Person Of The Year.” But instead of staying quiet, he decided to mock the 16-year-old on Twitter.

So ridiculous. Greta must work on her Anger Management problem, then go to a good old fashioned movie with a friend! Chill Greta, Chill! https://t.co/M8ZtS8okzE

— Donald J. Trump (@realDonaldTrump) December 12, 2019

So much for Melania Trump’s #BeBest campaign.

Nobody is allowed to mention Barron Trump’s name, but the President can attack a 16 year old with Aspergers? ? #ThursdayThoughts #BeBest pic.twitter.com/39KCg3nBDN

— David Leavitt (@David_Leavitt) December 12, 2019

But Trump’s criticism of Thunberg doesn’t seem to bother her, in fact it seems to embolden her. Today she made Trump’s statement her Twitter bio.

Climate activist Greta Thunberg changes Twitter bio to troll Trump. Again. https://t.co/htq8tm6w20 pic.twitter.com/4BN9E6xZiG

— South Florida Sun Sentinel (@SunSentinel) December 12, 2019

Buzzfeed points out:

Trump’s affinity for Time’s Person of the Year precedes his time in politics. A fake Time cover featuring him as Person of the Year was found at his golf clubs. He ultimately received the honor for real in 2016.

But he’s also complained about not being selected for the honor several times this decade, and in 2017 claimed he turned it down after the magazine told him he “was PROBABLY going to be named ‘Man (Person) of the Year,’ like last year” with conditions. The publication denied his claim and honored “The Silence Breakers,” who were the women who spoke out against sexual harassment as part of the #MeToo movement.