Human language is, of course, far from static. Our vocabularies are constantly being influenced by cultural movements, migrations, new technologies and much, much more. Indeed, even good old-fashioned mixups can shape the way we speak, write and think. As this animation from BBC Ideas explains, there’s a long and rich history of commonly misheard sayings eventually becoming widely accepted, and even replacing the original phrase. So if you’ve ever deployed ‘duck tape’ or spent an afternoon ‘biting your time’, worry not: you might just be on the idiomatic cutting-edge.