Chrissy Teigen blasts critic who suggests she cover up

You don't want to mess with Mrs. John Legend! 

The model, who is known for her sexy photoshoots, posted a naked picture of herself on Instagram, in which she was strategically using her arms and legs to be sure she wasn't showing too much.

An Instagram user piped up, reminding Teigen that she is married to singer Legend and maybe it's not a bad idea to cover up once in a while. Teigen didn't appreciate the criticism-- to say the least.

The Sports Illustrated cover gal fired back and posted a profanity-filled reply that ended with her telling the user to "keep taking pictures of crayons."

Lesson learned. Let Chrissy be Chrissy.