Definition of stuff happens in English English dictionary
(deyim) "Shit happens" is a common slang phrase, used as a simple existential observation that life is full of imperfections, either "Así es la vida" or "C'est la vie". The phrase is an acknowledgment that bad things happen to people for no particular reason. Phrases with similar meaning are such as "stuff happens" or "it happens" and are considered minced oath forms