heads-up

Noun

US idiomatic

Japanese Meaning

注意を促す警告・呼びかけ / これから起こる事態の予告・通知 / 事前に知らせるための合図

Just wanted to give you a heads-up that the meeting has been moved to 3 p.m.

念のためお知らせしますが、会議は午後3時に変更になりました。

Sense（1）

Send everyone a heads-up about the inspection tomorrow.

Sense（2）

There were only two of us, so we started playing heads-up.

heads-up

（ plural ）

heads-ups

（ plural ）