I sleep in a racecar, do you sleep in a racecar
A total embarrassment used when someone has no idea what they're talking about. It’s like a last-minute attempt to sound fancy even though you're clearly not.
He said it during a debate about who had the best pet, and no one believed him.
She used it in a conversation about food, and it just made everyone laugh.
He blurted it out in class when the teacher asked who had the most homework.