When it comes to Pretty Little Liars, you can be sure of a couple things. One, you're going to spend a lot of time trying to figure out who "A" is. Two, you're going to spend the rest of your time being terrified. And yet, in spite of the heavy subject matter of the show, we like to have fun sometimes, too! We've already shared a huge bunch of our favorite facial expressions ever, but today, it's all about the sass. Keep scrolling as we pick out the absolute sassiest moments in the show's history.
Source: ABC Family