Cách sử dụng
The expression "wait up" is used when you want someone you're walking or traveling with to slow down or stop for you to catch up. For example, if you're walking with a friend who's walking faster than you, you can say "wait up" to ask them to slow down so you can walk together. Or if you're riding a bike and someone is falling behind, you can yell "wait up" to ask the group to stop and wait for them to catch up. It's a casual, friendly expression that can be used in informal situations.