bust a nut in English dictionary bust a nut Meanings and definitions of "bust a nut" verb (idiomatic, slang, vulgar) To ejaculate. verb (idiomatic, slang, vulgar) to work very hard, put in a lot of effort more Grammar and declension of bust a nut bust a nut (third-person singular simple present busts a nut, present participle busting a nut, simple past and past participle busted a nut) more Sample sentences with "bust a nut" Declension Stem Match words all exact any Try again Authors