OP I can relate to your dilemma.
As a previous poster mentioned, I too grew up being told only whores and junkies had tattoos and piercings, so obviously I had 2 tattoos and 6 piercings by the time I was 21. My gradmother actually cried when she saw the first one 
My DW is not the major fan of tattoos. She knew I had them before we got together but as they are small and discrete, she ignore them. However it never crossed her mind that I would want more tattoos one day. For several reasons including financial priorities I never got around to have more done.
As one of my cousins is now a brilliant tattoo artist, I brought this up a while back and DW was surprised, a bit shocked and asked me not to. She said she fell in love with me as I was, including the tattoos I already had and that I had beautiful skin and she wishes I kept it that way and not add to it. She is very pro natural look which I also always knew.
The difference is that I was not given an ultimatum. And would react poorly to it.
That being said, I would say the best would be to have a calm discussion with your husband and explain why the tattoo is important to you and ask him why he is opposed to it when you already had some to begin with. I understand he says it disgusts him, but I would wonder what else had caused such an outburst as it is an overreaction.
I think people that do not have tattoos will never understand how it will never be "just the one". A friend of mine described it as being almost a sort of addiction.
Yes, your body, your choice but is it really worth it to end a relationship over it (if it is an otherwise happy, loving relationship?). How about a compromise on location or size of your tattoo? For the record I do not have but adore lower arm tatoos both in males and females.
In my case, we have agreed no full arms, no body armour, no face tattoos and smaller discrete designs if/when I have a new one. And yes, it was my body my choice as well, but I was happy to reach a compromise. I would have more issues with DW saying something about my weight than my tattoos tbh.
And to those who say how tacky and chavy and uneducated, I have a higher education degree and HOD in customer facing corporate environment and having piercings or tattoos has never affected my career, jobs prospects and will definitely not prevent my (future) children from having an interest in reading. My body does not reflect my level of educationj nor my literacy, and will most definitely not be a reflection of my children's education. Sadly, stereotypes are everywhere.