What would you say to someone who shows off their salary to you?

One word: Unfriend.
Jokes aside, money is only one aspect of things. A person's character and integrity are much more important traits in a friend.
Besides, if you found yourself in a situation in desparate need of money one day, would this friend pass you the money you need? Food for thought.

Keep asking her to treat you then - since she like to show it off, she can show it off through her actions! Stop asking her to terat you when she stops showing off her salary!

Depends on how close they are. what they are trying to do;
1. Make you envious,
2. Start of progress to sell you MLM
3. try to attract you (>vo)

If 1, can ignore cause it’s probably a sign of insecurity. If you are really close, you can act “wow” and ask for treat, but pity them inside for their insecurity. If you really dislike this person, try to sell them some product.

If 2, ignore, if you ask for treat they might invite you for an MLM event. But... if free meal...

3? Up to you.

Actually there is a possibility that they don’t know what they are doing is showing off. Cause after reflection, I realise did this before, but it was regarding my savings not salary. I was actually sharing cause I was feeling abit insecure about my financial situation (after retrenchment exercise in 2008) didn’t think it was considered “show off”. My friend later privately told me not to talk about money during meet ups. So if you think this is a possibility and you are close enough. You can remind them nicely. Maybe you could phrase it like “don’t make yourself a target.”

Just look at it and say: So little only ar!

If he showing it to you before the bill comes (assuming ou guys are having a meal):Wah since you earn so much, this meal on you lol