The 'Open the Gate!' meme is a popular four-panel comic strip featuring a knight and a guard at a castle gate. It originates from the webcomic 'Oglaf' by Trudy Cooper and Doug Bayne, first published in 2010. The comic depicts a scenario where the knight orders the gate to be opened, then immediately demands it be closed after hearing a specific detail, often followed by a final panel where he reconsiders slightly. It is widely used across the internet to represent gatekeeping, sudden shifts in opinion, or the 'hypocrisy' of fandoms and social groups when presented with new information.