Quote from Georgie in the episode A House Divided
Mandy: No, you're always giving your mom a pass for everything. Georgie: Oh, come on, her husband just died, her favorite kid moved away... Mandy: You? Georgie: Sheldon. And she's stuck living with my sister, who hates her and hates the world. Mandy: [scoffs] Missy's just being a teenager. Georgie: I wasn't like that when I was a teenager. Mandy: Honey, you're still a teenager.