Eekum Bokum comes from Banjo-Kazooie, the 1998 platform game by Rare, and is tied to Mumbo Tokens and the character Mumbo Jumbo. The line became memorable because players hear it repeatedly while collecting tokens throughout the game. Over time it spread into gaming compilations, retro nostalgia posts and meme edits as a shorthand for getting an item or unlocking progress. It still shows up in fan videos because the phrase is unusual, catchy and instantly linked to classic collectathon gameplay, much like the Zelda - Item Get sound in other pickup jokes.