The phrase "no cover" typically means no cover charge or no entrance fee. It is often used in contexts like bars, clubs, concerts, or events to indicate that you don’t have to pay an entry fee to get in.

Example:

• A club might advertise: "No cover on Thursdays!" meaning you can enter for free on Thursdays.
• A bar might say: "No cover charge tonight" indicating there is no fee to enter.

If you have a specific context where you saw "no cover," feel free to share it, and I can explain more precisely!