How do I tell a coworker to stop complaining?

I was stuck with someone who always complained at work. Like you, I had it with the constant negative comments. One morning, I said to my co worker "I do not think you realize how much you complain. Today I am going to count out loud each time you complain so you are aware of the frequency in which you do so."

Then, I began counting...."That is number 1 complaint today"...."That's number two"...."That's number three"....and so on.

This was a verbal reminder of the number of complaints I was subjected to and by lunch time, the number reached a whopping 17 complaints. Not even I realized it had gotten that bad, but that was the typical day. Well, I guess I made my point, because the co worker stopped complaining, out loud, at least. Yippiee!!

How about, "The manager can hear your complaints. You'll need to tone it down or you'll be in his/her office explaining why it's taking you so long to get your part of the job done.'

Don't worry about being nasty, just say knock it off, find another job if you don't like this one! that should shut him up!

Just change the subject every time he starts up. Start talking about sports, or car trouble, or painting your kitchen, or anything irrelevant to his complaints. If he sees you're not listening, he might go take his whining elsewhere.

One day start wearing ear plugs. Make up some excuse like, you have a bad headache or something. Then just start wearing them every day. He'll stop talking if no one is listening.

i would just let him complain if you want to get rid of him then sooner or later he wont have a job to complain about

shoot him

Tell him by giving him the impression that you're helping him. Say to him conspiratorially, "Dude, I would seriously suggest you tone down the complaints about the level of work. You could easily give management the wrong impression, and if they think you're a slacker, that's not going to sit well, ya know?"

you tell him he´s being totally unprofessional , he needs to do his job without interfering with production , and get the job done , if he continues to complain your complaining to the boss , good luck

a guy I worked with for a while used to say that it's surprising what you can get away with saying right in peoples' faces, as long as you say it with a huge, convincing smile

and there's a lot of truth in that

you need to be good at maintaining that big friendly smile though, and the positive attitude behind it. just as in space combat, once your shield goes down it's all over.