Guilty of all the above at some stage, except Retlaw's; took me a bit to sort them out.
Also Flashy's 'chillax' .. never heard that before ..
I dislike lots of buzzwords but, again, have found myself using them when you are surrounded by people who constantly use them :
Thinking out of the box.
Netiquette.
Mapping.
Going forward.
Innovation ... due to the fact that the derivative 'Innovative', I always struggle to say first time.
Best Practice.
Downsizing.
Wellness.
Out of the loop.
Mission.
Blah, blah, blah ... LOL.
The one I hate the most is 'guesstimate' .. yes, have used it and apologised for doing so.
Can't stand anyone saying 'you guys' when it is obvious I am a gal.