The one I loathe in the workplace is "uh-huh". I used to thank a fellow I worked with, and this was his response to me. It felt dismissive, kind of like a teenager responding "whatever, dude".

A fellow worker used to always say "No Problem" as though he was doing the biggest favour in the world. He also used that phrase for any bad situations that arise. I'll have news for you it's a problem so deal with it and don't be condescending! This was in my particular situations. Anyway, he was a problem and was fired after not actually taking any action! So does say that answering someone with no problem means no action is actually being taken? lol

The statement of "no problem" is basically the same as "im glad to do it" basically stating that no matter what it is I am asked to do it is no problem to me as i am happy to assist. While working in the service industry at an amusement park I was constantly busy and those guests that I helped that were grateful enough to say "thank you" seemed to be worried that by helping them I was being inconvenienced. By replying that it was no problem, I hoped to assure them that my assistance to them, though adding to my workload, was not an issue and I was glad to do it.

@ skipo: either those saying "no problem" are putting in a great deal of effort or at the very least doing a minor service to you the customer. basically its the same as saying that no matter what level of effort it takes it is no problem for me to assist you.

This, to anyone who thinks about what is actually being said, is a subtle form of rudeness. What you are saying is, \

This, to anyone who thinks about what is actually being said, is a subtle form of rudeness. What you are saying is, \

This, to anyone who thinks about what's being said, is a subtle form of rudeness. What you are saying is, "If I had to make any effort, I wouldn't." Some might think it's the same as the Spanish "de nada" or the French "de rien"; but those actually translate into the English "it's nothing" a modest dismissal of one's efforts, while "no problem" might be interpreted as the dismissal of the recipient's worthiness. The difference is subtle: it's the one between compliment and insult.

This, to anyone who thinks about what is actually being said, is a subtle form of rudeness. What you are saying is, \

I never noticed this was a bad trait.

I hate this but find it slipping out every now and then. I consciously try not to.

I do that!

I still say this... OH CRAP!