A noun meaning the very best or extra-fine; used in phrases like 'a top-notch ~' or 'the best ~'.
彼女はとびっきりの笑顔で迎えてくれた。
She greeted me with an outstanding smile.
とびっきりのワインを一瓶持って行こう。
Let's bring a top-notch bottle of wine.
An adverb meaning exceptionally or extraordinarily; used to emphasize an outstanding degree.
今年の果物はとびっきり甘い。
This year's fruit is exceptionally sweet.
彼はとびっきり仕事が早いので助かる。
He works exceptionally fast, which is helpful.
とびっきりのお土産を見つけたよ。
I found an outstanding souvenir.