This is the 5754th most frequent Japanese word.
とびきり
"Exceptional; outstanding; extraordinary."
Used to denote an exceptionally good idea.
彼はとびきりのアイデアを思いついた。
He came up with an outstanding idea.
Emphasizes the extreme brightness of the smile.
とびきりの笑顔で私を迎えてくれた。
They welcomed me with the brightest smile.
Adjective to describe ‘exceptional’ quality of the cake.