A Slip of the thumb
A thumb slip is when you accidentally say something stupid because your brain is too lazy to work properly.
I told my teacher I was going to fail the test. It was actually my math teacher. He said, ‘That’s not a problem.’
I told my crush I was going to marry him. It went to my crush’s dad. He said, ‘I already have a wife, and it’s not you.’
I said I was going to eat a sandwich. My mom said, ‘That’s not a problem.’ I said, ‘That’s not a problem.’ I said, ‘That’s not a problem.’