If there is one thing you don't want to do when you are invited somewhere, it's to insult the people hosting you.

Saturday Night Live's Pete Davidson made that mistake at the University Of Central Florida's welcome event for its students, where he performed a set and went on a profanity-laden rant in the middle of it.

The audience was filming the set on their phones, which is apparently what set Davidson off.

"Whenever somebody else comes to your f***n' town and wants to perform and is exhausted and flies all the way to the middle of f****n' nowhere to do jokes for you little privileged ***holes, don't f****n' ruin the show for people who actually wanna be here," he yells at the crowd.

"That's why the world is gonna end in 25 years, because you're all f****n' r***rded."

As the audience boos, he says: "Yeah, I meant it that way, idiots. You should f****n' grow up."

You can watch the video below.

Warning: the following video contains graphic language, including an ableist slur:

Pete Davidson at UCF 8/26/19 www.youtube.com

The University Of Central Florida was not amused.

"Mr. Davidson's abusive language, particularly his use of a derogatory slur, is contrary to the University of Central Florida's values of inclusion and respect for all," said a spokesperson for the University to BuzzFeed News.

"It's disappointing that his rant spoiled an event that was meant to welcome students back for the fall semester."

The Twitterverse was likewise unamused by Davidson's poor judgement.

But others took a more positive spin on the situation:

Davidson has been through a lot in the past year, including an engagement and breakup with Ariana Grande, a short-lived relationship with Kate Beckinsale, and several mental health trials and tribulations.

But still, people were not amused.

Neither Davidson nor his representatives have yet to comment as of the time of publication.