Broly first appeared in the 1993 Dragon Ball Z film as the Legendary Super Saiyan, a Saiyan whose power grows out of control when he fights. He returned as a canon character in Dragon Ball Super: Broly in 2018, which made his berserk form popular with a new generation of fans. The phrase wildin comes from online slang for acting wildly, and fans paired it with his intense stare and transformations. Short clips using the line spread through anime edits and reaction posts, where it now signals someone about to lose control completely.