I put a flag on it - I put a flag on it means you're making something yours and y

I put a flag on it means you're making something yours and you're being a total jerk about it

I put a flag on that last candy bar. You're not getting it. I'm a candy god.

She put a flag on my desk. Now I can't write. I'm in pain.

I put a flag on that spot in the car. You're not sitting there. I'm the boss.