When her Modern Family co-star Sarah Hyland shared a snap of the cast, someone called out Ariel for looking "thirsty" in the photo.
"Why does Ariel look so thirsty all the time?", they posted.
Never one to back down from a cyber bully, Ariel clapped back: "I’m SO thirsty. Haven’t had water in hours. God, I can’t believe you can tell I’m dehydrated from this pic."
Warning to all: if you get too close to the flame, you will get burned.
Of course, this isn't the first time Ari has hit back at haters.
Last year she spoke out after she was the target of online trolls who shamed her for wearing a short dress to church.
A gentle reminder that cyber bullying is NEVER OK.