about time
US /əˈbaʊt taɪm/
UK /əˈbaʊt taɪm/

慣用句
1.
やっとだ, そろそろだ
used to say that something should have happened sooner or a long time ago
例:
•
It's about time you cleaned your room!
部屋を掃除する頃合いだ!
•
The train is finally here. About time!
電車がついに来た。やっとだ!
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