i smell shit face - That face you make when you’re trying to hide the fact that

That face you make when you’re trying to hide the fact that you just peed your pants and someone else smelled it too.

I tried to act cool but my friend knew I had peed my pants in math class.

I walked into the hallway and my teacher knew I had been eating onions for lunch.

I tried to smile but my crush knew I had been wearing the same socks for a week.