Negatively impact - not particularly new but probably still the example par excellence of managerial  wankspeak. Means harm or damage. So why not use one of these fine, transparent words? Well, if consultancy types did it might become clear that they were stating the obvious and that would negatively impact their ability to charge thousands of pounds per day.

NewTrack or NuTrack - the word currently being bandied around to describe whatever is going to replace Railtrack.

Nutraceutical - A food product with some claimed health benefit (e.g. tastes great and reduces cholesterol).