long boys never grow up
Édouard Urcades

"Long boy" is the colloquial name for two connected memes: a way of referring to any cylinder or cylindrical object, and a specific image of an orange cylinder, based off the first meme. Both were established by a throwaway line in a Special Meme Fresh image that categorised sending images of cylinders to your friends and saying "haha long boy" as the 5th layer of irony.