I seriously wouldn’t ridicule or bring attention to an insecurity like this. I mean honestly is stuttering a characteristic you want memorialized on your body? If I saw it on a man even if it was done in jest, I would question his mental health, but that’s me. And my dh is a stutterer. Coming to peace and acceptance is the best way on the inside. Get a tattoo but pick one that means something to you and not something that can be triggering.