They troll you. It reads "don't you hate it when you find out you've been trolled". Well, the cheese and starfish don't mean anything, it's not supposed to. That's the troll, to get you to break your head about what it's supposed to mean.
There's a type of cheese I forgot what it was but if you combine that with star at the end it's an insult which means idiot. I've been trying to find the word for.the past hour
Look at all the people who got it