Kedeng kedeng is the written and spoken imitation of a train in Dutch and Indonesian, built from the clack of wheels passing over rail joints. Online, the phrase became a handy shorthand for any slow, chugging journey, and short clips of the repeated sound spread through soundboards and meme edits. Creators reuse it whenever a character sets off, a vehicle crawls forward, or a trip takes longer than expected, because the rhythm is understood instantly without needing a real train recording or any explanation on screen at all.