The phrase get back in the kitchen comes from a long running sexist stereotype about women belonging in domestic roles, which internet culture turned into an ironic meme in the 2000s and 2010s. Short shout versions spread on soundboards, forums and video edits as a deliberately provocative reaction clip. It is rarely used seriously online now, and is mostly dropped for shock humour, parody of outdated attitudes, or to mock someone using the line unironically in games and streams.