The 'Let's Kill Him' meme originates from a climactic scene in the 2019 blockbuster Avengers: Endgame, featuring Iron Man, Captain America, and Thor confronting Thanos. The specific line, 'Let's kill him properly this time,' is delivered by Thor as the trio prepares for their final battle. In the world of internet memes, this template has evolved into a symbol of collective determination, often used to describe a group of friends or online users uniting to defeat a common enemy, tackle a difficult task, or simply make fun of a shared annoyance. Its popularity lies in the contrast between the high-stakes cinematic tension of the original scene and the often hilarious, low-stakes situations it is applied to.