What does You stay flexing mean?

At school, these boys said I was flexing with my iPhone, Michael Kors shoes, Ralph Lauren. Etc, and they told me "Leslie stay flexing" and I was wondering what that means.

Added (1). Is it bad? Or a good thing to get such comments?

Lol stunting like showing off wit big ***

*Showing off* your ability to do something is bad.

  • Why should you always stay up to the date with the latest gadgets? I have a iphone 5 and want my parents to get me a 5s. I told my parents the 5s is faster, better battery, camera and ID scanner (I want that so bad: D) but my parents won't do it! So how can I convince them that you should ALWAYS stay up to date with the latest gadgets?
  • Why does my unlocked iPhone 3GS stay locked? I jailbroke it with redsnow, unlocked it with Ultrasnow a million times over and it remains locked. Using baseband version 05.13.04 with 5.1.1 iOS. Calls and text work fine, but no data, no matter what. Use Wi-Fi in my house, but that's all i can use. I've spent a week doing this over and over and nothing seems to work. Tried dozens of videos online, countless blogs and i followed every, single step x amount of times. Using straight talk right now, should I try T-mobile maybe?
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  • Why does my iPhone lockscreen stay black? I just downloaded IOS 7 on my iPhone5 and I started using my iPhone for a while and now it just stays black, does not turn off, and just takes screen shots. I tried plugging it in my computer and making it restart but it also does not let me at least plug it in.