cuntfuck /ˈkʌntˌfʌk/noun 2verb 1forms 3 noun2 •(slang, vulgar) An act of vaginal penetration. •(vulgar, offensive) A stupid or otherwise undesirable person. verb1 •(slang, vulgar) To engage in vaginal sex. formscuntfucked · cuntfucking · cuntfucks