The “Professional Retard” meme features SpongeBob SquarePants sporting a nametag that reads "Professional Retard." One of the reasons behind its widespread popularity is because it features one of the meme-loving demographic's favorite animated characters, SpongeBob SquarePants.
This meme, as I'm sure you already know, originates from one of the world's greatest cartoon series, SpongeBob SquarePants. Although it isn't clear which episode of the 244 available episodes the "Professional Retard" image macro originates from - if it even originates from one of the 244 episodes' many millions of stills in the first place - it's clear that the image has been edited substantially.
The upper half of the image, which features SpongeBob SquarePants' face, was likely animated by the original poster himself or herself. The suit and tie, SpongeBob's trademark outfit, looks like it comes from an episode, though we'll likely never know which one. Further, the nametag also likely comes directly from an episode.
The nametag's contents, "Professional Retard," obviously don't come from any SpongeBob SquarePants episode.
The first known person to share the image was ADashOfClockAndALotOfKnives, an Imgur user who shared it on the image-sharing platform. Its caption was "When you look at a mem for 30 sec then you notice it is an ad [sic]".
A Reddit user posted what is now known as the "Professional Retard" meme to the r/dankmemes subreddit. The post has since received upward of 30,000 points at a 97-percent upvote ratio.
We all make mistakes. People use this image macro, adding captions of their own, to share dumb or silly things they've done in their lives or noticed in pop culture.