I digress

When you completely forget what you were talking about and decide to talk about something dumb instead. You say it when you realize you're being an idiot and try to go back to the actual point.

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.

When you're trying to speak English but your brain is still in your native language and you accidentally say something ridiculous instead.