when you see a Vietnamese gamer say this word, it means that their internet bandwidth is cut and they are most likely to either quit the game or live with the lag.
"He is randomly teleporting around the map, he must be cheating!" - "Don't be worried, he just said "dit me fpt", he's just lagging."
"Stop AFK-ing ever so frequently, we're gonna lose the game" - "I can't play, it's dit me fpt"