I'm going to fail this test
A stupid thing to say when you're too lazy to study and you're pretending you're confident but you're really just a mess.
'I'm going to fail this test' said by a kid who didn't even open his textbook.
'I'm going to fail this test' said right before he got a 20% on the quiz.
'I'm going to fail this test' said while he was still chewing his lunch.