I'll tell you that shit for free
when you’re so full of yourself you think you’re doing your friend a favor by telling them the answer for free
You: 'I’ll tell you that shit for free' because you think you’re doing your friend a favor
Your friend: 'You’re like a teacher who doesn’t get paid' because you give out answers all day
You DM your brother: 'I’ll tell you that shit for free' because you think you’re being generous