Smerking means smiling in a way that shows you have a secret or that you think you are better than someone else.
Smerking can seem a little bit mean or sneaky. It's like you know something other people don't.
Examples:
She was smerking at me.
He's always smerking when he wins.
They were smerking at the joke.
Stop smerking at me like that!
I caught her smerking when she thought no one was looking.
The cat was smerking at the mouse.