WTH en · INTJ Meanings (Internet, abbreviation, alt-of, initialism, mildly, vulgar) Initialism of what the hell or what the heck. alt of what the hell or what the heck Before you could say WTH (what the hell), I ran in with my fist balled up as tight as possible, swinging at whatever piece of this man I could hit. 2011, Epiphany Toi Williams, Epiphany Rise: No More Secrets, page 68: Relateds wth Synonyms WTF