also: きょういち
today's best; best of the day
Colloquial abbreviation of 今日一番, used in casual conversation or social media to refer to the best thing that happened or was encountered today.
I got the best smile of the day.
このラーメン、今日イチだね。
This ramen is the best I've had today, isn't it?
Hiragana variant; less common but still seen in casual writing.
Abbreviation of 今日一番 (kyō ichiban, 'today's number one'). The reading イチ comes from the on'yomi of 一.