Listable has a list of words it is not okay to ever say. I was going to post my own over here at some point, but I never got around to it. But here are my favorites:

Convo
Za (as in pizza)
Webinar
Lifestream
Funnest
Natch
Vaycay
Staycation

And I’d like to add to that (in no particular order):

Webisode (It doesn’t matter if it’s [...]