Its a meme that started from the Batman Arkham Asylum sub where its used whenever you get bamboozled by images with slide button that trick you into thinking its a multiple image post. Alternatively you can also comment “I wiped” as a reference to this joke.
against my better judgment I put my thumb on my phone screen and moved it in a lateral motion towards the left, only to be bamboozled cause there was indeed no second image as the little 1/2 symbol in the corner indicated and it was indeed a prank at my expense yet I still proceeded to fall for it despite my initial fears warning me