どうってことないMeanings1expressionnothing special; no big deal; doesn't matterusually written using kana alonecolloquial›Colloquial phrase used to downplay something as unimportant or not worth worrying about. Often used in casual conversation.そんなの、どうってことないよ。That's no big deal.ちょっと転ころんだだけだから、どうってことない。