I sleep in a racecar, do you sleep in a racecar
A total embarrassment used when someone is too scared to admit they're losing. It's like when you're getting trounced and you just throw out a stupid line to make yourself feel better.
He said it during a game of basketball when he couldn't even make a shot.
She used it during a science fair and no one believed her.
He yelled it in class when he got called out for not doing his homework.