I'm going to use a specific word as much as possible to drive my co-workers nuts.
Do you really like using that specific word?
No, but it annoys them more, so I will put up with it.
Why would you do this? Building a reputation for being annoying will bite you in the butt when you need references for your next job hunt.
I'm basically already at the end of my career, so yeah I don't care.
Even if you're nearing the end of your career, you would leave a bad legacy and you will not like how people will remember you. If I were you, I would leave people remembering you for being respectful and kind to others so that you will be loved.