どうってことない

Meanings

1

nothing special; no big deal; doesn't matter

usually 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。
I just tripped a little, so it's nothing to worry about.