flgotchu 

For life I got you. It’s used mainly in text to say I got you but for life it’s pretty self explanatory if you look at this definition and if you don’t get it let me explain it for you kindergarteners.
If someone texts/says flgotchu it means they have your back for life.

Captain America: Let’s go to the fight!
Ironman: flgotchu!💯

But, they’re texting in an Avengers Assemble group chat.

flgotchu by YRWBaby September 10, 2020