Tina Fey gives Letterman dress off her back on 'Late Night,' declaring it the last fancy dress she'll ever wear

So Tina Fey stopped by the "Late Show" Thursday night, and the funny lady shared a few things David Letterman would have to look forward to upon retirement.

Fey specifically wanted to warn the host that he'll be getting a whole lot of invites to galas such as the recent Met Gala. And in the event that she was right, Tina advised him to "drink contact lens fluid," so he ends up in the hospital and has an excuse not to go.

"It is such a jerk parade ... if you had a million arms and all the people you would punch in the whole world, they're all there," said Tina Fey on the 'Late Show.'

We're guessing Anna Wintour didn't love her famous Met Gala being called a "jerk parade" ..

... though judging by how Tina ended the show, it's probably safe to say she doesn't really care what anyone thinks period.

As a parting gift to Letterman, who is set to retire on May 20, Fey literally gave Letterman the dress of her back, declaring it the last fancy dress she'll ever wear on a talk show.

"What am I going to put a dress on for Jimmy?" she said of the Tonight Show's Jimmy Fallon. "That's creepy, he's like my brother."

"I'm going to wear like special underwear for James Corden? That's not going to happen," she added.

"Because this is my last time wearing a fancy dress on a talk show and conforming to gender norms, out of respect to you," Fey told David Letterman, "my gift to you is I want to give you the dress, you can keep it."

Upon that declaration, Fey stripped off her fitted embroidered and quite beautiful blue dress, under which she had some sort of shape-wear bodysuit that said #TheLastDress across her rear and "Bye Dave!" across her torso. Then she bent over and mooned everyone.

Letterman looked accordingly shocked and delighted, and Tina won the hearts of women around the world yet again.

To see more of Fey's antics, you can catch her new movie "Sisters," which premieres December of this year.