The short form for "kiss" is kiss. "Kiss" is already a short, concise word and doesn't typically have a shorter abbreviated form. However, in text messaging or online communication, some might use abbreviations like "xx" or "xo" (representing kisses and hugs), although these symbolize a kiss rather than being a shortened version of the word itself.
While "KISS" as an acronym usually refers to "Keep It Simple, Stupid" or "Keep It Short and Simple," this is unrelated to shortening the word "kiss".
