Over it

I can’t take it anymore 😩 my son will literally just throw his plate on the floor the second I put it in front of him. What do I do?? I literally can’t afford to make him another meal I’m struggling as it is. What do I do? When he does that I tell him dinners over and I’m not making him anything else. He’s been testing me so much lately and he laughs when he does stuff like this I’m about to have a mental breakdown, he can’t live off only fruit, someone please give me advice 😭😭