Something is worthless if its value or usefulness is zero.
The word "worthless" gets used pretty often when someone's talking about something that's not very good or has no practical use. For example, they might say a movie was worthless because it had too many plot holes and wasn't entertaining. Or maybe you're trying to sell an old bike but nobody wants it, so it's essentially worthless. It can also be used for people: if someone is being really annoying or useless, you could call them worthless in a joking way, but that's not the best thing to say in real life!
Having no worth or use; without value; inconsequential.
Example: Don't be a worthless slouch! Go get yourself a job.
