I'll get right on that - A fake plan that means you're going to do nothing, maybe eve

A fake plan that means you're going to do nothing, maybe even laugh at the person who asked you to do something.

'I'll get right on that,' he said, then spent the whole day eating pizza.

'I'll get right on that,' she said, then went to sleep and never woke up.

'I'll get right on that,' he said, then texted his mom about how unfair life was.