Cách sử dụng
The word 'grin' is used to describe a big smile. It's a facial expression where the corners of your mouth are turned up and your teeth may be showing. You can use the word 'grin' when you are really happy, amused or excited about something. For example, if you receive good news or if someone tells you a joke that you find funny, you might grin. It's also possible to use the word 'grin' in a sarcastic way, where you smile to show that you're not being serious or you're being ironic.