Left 4 Dead is Valve's cooperative zombie survival game, first released in 2008, in which Zoey is one of the four playable survivors fighting through infected hordes. Her short voice lines were designed to be heard clearly during fast, chaotic gameplay, and yoink stands out because it is playful rather than panicked. Clips of the line later circulated among players and editors as a ready-made reaction for stealing or grabbing something, and it remains popular because the single word needs no context to land as a joke.