Imagine walking around like this in public

Incredibly gross that someone would wear it.

It's a play on the song titled "Eat, Sleep, Rave, Repeat" is a song by Fatboy Slim, Riva Starr and Beardyman.

A quick internet search will find that it's an old shirt, which makes sense with the song, has had numerous articles written about asshole wearing it, and apparently you can buy it on Amazon, but I didn't click that link.