With age comes wisdom, we guess: YouTube sensation Chris Crocker (of "Leave Britney alone!" fame), came out of semi-retirement on his birthday to send a message to President-elect Donald Trump: Stop acting like a child.

"Hi, I'm the 'Leave Britney Alone' guy. I was a meme & laughing stock for 10 years. I delt it," Crocker, now 29, tweeted. "You're the President-Elect. Grow up."

The message was sent after Trump insisted he'd tweet less "if the press would cover me accurately & honorably."

The real-estate mogul has yet to complain about Crocker, but we're sure it's just a matter of time before he declares him "overrated" or "terrible."

Since going viral in 2007, Crocker has appeared in gay porn videos, starred in a documentary that screened at Sundance, and came out as transgender. (He still appears to be using male pronouns.)

“Some people get a haircut. I change genders or gender aesthetics," he told Queerty in 2013. "I don’t know that I’ll ever be content just one way or another. But I’m on the journey to figuring that out."

We wish you well on your journey, and hope you keep giving the next POTUS what for.