Every Saturday I’ll give you a couple of idioms to learn. An idiom is a saying or phrase whose meaning cannot be taken from the literal meanings of the words.
sell out: completely sell the inventory so no stock is left.
Example:
The bookstore ordered 100 copies of the author’s latest book, but they sold out within a week.
mean business: get serious about something.
Example:
The boss said the deadline for the report is next Monday. You’d better make sure you get it done—he means business.