flag up
Upper Intermediate (B2)neutral
To tell someone about a problem or important thing so they know about it.
"I wanted to flag up a few concerns before we proceed with the project."
Hear it in context

I WON Jynxzi’s League of Legends Streamer Tournament! 🏆
RAY LIVE · 77:51
Keep your flag up.

1 Liberal Man vs 20 MAGA Women (ft. Dean Withers) | Surrounded
Jubilee · 98:28
Everybody still has their flag up.

I WON Jynxzi’s League of Legends Streamer Tournament! 🏆
RAY LIVE · 77:49
Okay, I keep your flag up.

The genius logic of the NATO phonetic alphabet
RobWords · 19:44
Then the circled numbers flag up where

1 Liberal Man vs 20 MAGA Women (ft. Dean Withers) | Surrounded
Jubilee · 98:42
everybody with their flag up is a radical extremist,