Meaning

originProbably of Old Norse origin like kjǫt (“meat”), from Proto-Germanic *ketwą. Compare Icelandic kjöt (“flesh”); akin to Swedish kött, Danish kød, and Norwegian kjøtt. The use of the term ket for "candy" or "sweets" probably derived from its use to describe sweet meats or as a deterrent to children.

Etymology from Wiktionary, CC BY-SA 3.0