よーいドン
also: よーいどん · よういどん
よ
う
い
ド
ン
Meanings
1
ready, go!
usually written using kana alone
Used as a starting signal in races or competitions, equivalent to 'On your marks, get set, go!'.
See also: ドン
When the teacher shouted 'Ready, go!', the children all started running at once.
2
usually written using kana alone
By extension, refers to a race or any contest that starts with this signal; often used metaphorically.
I won first place in the race at the sports day.
The launch of the new product is a race among the companies.