ガーン LinksSentence search for ガーンSentence search for があんSentence search for がーんEdit in JMdict Adverb taking the 'to' particle, Adverb (fukushi), Noun1. boom; bang; whamOnomatopoeic or mimetic word2. Oh my God!; What a shock!Manga slang, Onomatopoeic or mimetic wordOther formsがあん、がーん Discussions Log in to talk about this word.