No joy is an English expression meaning a lack of success or failure; it can also mean a lack of luck. It is believed to derive from the lack of happiness or joy when success is achieved or a stroke of good fortune is encountered. Therefore no success, no luck, no joy.

U.S. Department of Defense (DOD) In air intercept, a code meaning, "I have been unsuccessful," or, "I have no information."

When a controll tower advises a pilot that he has an approacing aircraft. If the pilot does not see the approacing aircraft, after a few seconds, he can reply "no joy".