Nothing. They're words that, for some reason, the "upper" portion of society has deemed unacceptable, the true reasons as to why they're considered bad shrouded par the same mystery that every long-term thing like that is. They're just words, just sounds.
When they're over-used a lot of the time, they're bad in my opinion (more like annoying because they can't think of anything else to say). Saying them occasionally out of frustration is acceptable, though.