The line originates in A Slap on Titan, the fan-made comedy redub of Attack on Titan, where original dialogue is written over the anime's footage. Pastor Nick is its caricature of the Wall Cult, a sect that worships the Walls as divine, and his fanatical devotion became a running gag. Clips of his wall worship were ripped into meme soundboards and spread through anime edit communities. It endures because the shout is instantly recognisable to Titan fans and works as a one-word punchline for any wall or defence joke.