expression
don't worry about it; it's nothing; never mind
A reassuring, dismissive phrase used to tell someone not to be concerned, not to thank you, or to brush off a minor matter. Often said with a casual, friendly tone.
See also: いいから
「ありがとう!」「いいからいいから、気にしないで。」
"Thank you!" "Don't worry about it, it's nothing."
「大丈夫?」「いいからいいから、ちょっと転んだだけだから。」
"Are you okay?" "It's nothing, I just tripped a little."