These are attempts to disguise ugly facts as abstractions. Examples: using "development opportunity" when you mean "drudgery," or saying "rightsizing" when you mean "firing people." They mark you as a coward.

They turn statements into questions: a raise of pitch at the end of the sentence or an actual phrase, like "........., you know?" or "............, eh?" They indicate that you're not confident in your communication skills.

Using big, impressive sounding words rather than smaller, common ones can leave listeners with the impression that you're pompous and pretentious.

These are words or sounds you insert into sentences when you're pausing to think. Examples: 'um', 'like'. Too much of these will annoy your audience.

Unoriginal expressions used so frequently that they've actually lost meaning like  "out-of-the-box thinking" could reveal a lack of respect for the listener.

When you constantly take over normal words and use them in odd ways to make them sound "businessy", people will most likely roll their eyes.

This is what people do when they feel socially obligated to apologize but they aren't really sorry. This ends up being even more offensive. Example: "I'm sorry if anybody was offended."