BOI is a meme that is usually used when a user is about to give another user a lecture or they're just frustrated. The meme originally entered the wiki as a picture of Fred from "Scooby Doo" having a rather unimpressed look on his face sometime in October of 2016. The meme picked up steam fast and was used extremely often until it slowly died out sometime during November of 2016.
That same year the meme returned with a new look after 5555thExplosionMage showed Arigarmy the many memes showing Spongebob with his hands together with the lable "BOI". This changed the BOI meme from a Fred emoticon into a Spongebob emoticon that is used for the same purpose. The Spongebob version also arrived with the "Oh Neptune" emote.