"Oh, haha, motherfucker. Like I don't know my own face." Toph snapped though she, too, had a smile on her face. "What's the matter, are you shy?" She teased, using a baby voice. 

Lydia chuckled at Beetlejuice's antics, glad that she wasn't the only one who enjoy them and Beej wasn't getting scolded for it. She snorted when Toph asked him if he was shy, finding the voice hilarious.