I digress
A sneaky way to change the subject so you can avoid getting caught in your lie or getting called out for being a total dweeb.
'I digress' when you try to switch from talking about your bad grades to your cool new video game.
'I digress' when your friend points out you forgot your lunch and you start talking about your dog.
'I digress' when you're caught cheating and start talking about your favorite cereal.