wincest in English dictionary wincest Meanings and definitions of "wincest" noun (slang, with a positive connotation) Incest. verb ( archaic) second-person singular simple present form of [i]wince[/i] more Grammar and declension of wincest wincest (uncountable) more Wincest Meanings and definitions of "wincest" proper (fandom slang) The incestuous slash ship of the fictional brothers Dean and Sam Winchester from the television series Supernatural. more Grammar and declension of wincest Wincest (uncountable) more Sample sentences with "wincest" Declension Stem Try again Authors