give somebody/something a once-over
US /ɡɪv ˈsʌmˌbɑːdi ˈsʌmˌθɪŋ ə wʌns ˈoʊvər/
UK /ɡɪv ˈsʌmˌbɑːdi ˈsʌmˌθɪŋ ə wʌns ˈoʊvər/

1.
to quickly look at someone or something, especially to check their appearance or condition
:
•
Before the interview, I always give myself a once-over in the mirror.
•
The mechanic gave the car a quick once-over before we left for the trip.