Accent or just plain getting lazy

I never said I enunciated well. The other day with my vo-tech students- I used the word get only I said git (typical for me, wish I could say it was due to coarticulation) immediately my students started talking amongst themselves. I knew something wasn't right so I stopped and asked "What?" One student said we don't understand this "git". Then it hit me like ton of bricks, my enunciation was very poor on that word. They asked me if I would write it on the white board and of course I wrote "get". Then I tried to explain how I just blew it with accents and the lazy tongue etc. We all had a laugh and I tried to enunciate much more precisely after that. Spoke it all my life then I don't use the correct sounds "ain't American English grand"?