I'll Tell You that For Free - When you're so fed up with someone's stupidity that you just

When you're so fed up with someone's stupidity that you just drop the truth on them like a hot potato, no charge.

'I'll tell you that for free, I'm not even mad anymore.'

'You're gonna pay me? I'll tell you that for free, I'm done with your nonsense.'

'I'll tell you that for free, I just want this to end.'