No reason to do anything - it's entered our language now. End of story. It's in Wikipedia, so it's a perfectly cromulent word.

Have to disagree - I've been exactly there - though I'm in Canada. I would expect the legality to be very similar where you are though, so this may be worth looking into. I think what others may be overlooking is the fact that this was done for a university. With respect to the creator of the work, educational institutions generally do not have, and should not try to enforce IP ownership in the same ways that private companies do. In this case the employer does own rights on the work since they paid you for it, but as the originator you also retain rights to it. Search your university's charters for the term 'sponsored research'. I would say that either you or the university could redistribute the work, but that it would have to be done under the terms of the GPL. Within that framework you could even profit from the work provided that you do it transparently and in good faith - which means informing the other party of your actions.