noun
fifty-fifty; evenly split
Used for equal shares, chances, or mixed states, similar to English 'fifty-fifty'. Common in casual contexts.
成功の確率はフィフティーフィフティーだ。
The chances of success are fifty-fifty.
費用はフィフティーフィフティーで割り勘にしよう。
Let's split the cost fifty-fifty.