See also: Appendix:Variations of "mk" Etymology Likely from Abbreviation of Macedonian македонски (makedonski) Symbol mk (international standards) ISO 639-1 language code for Macedonian. Interjection mk (Internet slang, text messaging) Alternative spelling of m'kay. Anagrams KM Noun mk Initialism of markka (“Finnish markka”) (Finnish unit of currency until 2002) Synonyms Smk mk. See also FIM