To draw back the lips and reveal the teeth, in a smile, grimace, or snarl.
Grinning like an idiot.
A facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement.
He smiled and winked at me.
مسکراہٹ / ہنسی
What - interrogatively; "What should I say?".
You - Used to refer to the one ; "You should feel shame".
Button - provide with buttons; "Button the missing button".
Button - fasten with buttons; "Don`t button".