Sassy Nod

This look is like someone caught you in on a little secret and you're saying, 'I know, right?' with a shrug and a grin. It's perfect when you're nodding along but also raising an eyebrow like, 'you do realize what you're doing, don't you?' You'd use it when you're half-teasing, half-approvinglike you're in on the joke but still a little surprised by it.