noun
overtime; time's up
Wasei-eigo from 'time over'; used when time runs out, especially in games, tests, or timed activities. Not used for work overtime (that is 残業).
wasei-eigo (Japanese-coined English), from time over
試験でタイムオーバーになってしまった。
I ran out of time during the exam.
ゲームの制限時間が来て、タイムオーバーだ。
The time limit for the game is up; it's time over.