Whenever my husband is mad he calls me a fatass how can i make him stop?

My marriage is worth fighting for becuz he is a great dad. Clean hardworking and considerate of me in other ways. I told him calling me this really bothered me and i would divorce him if he didnt stop. He apologized and for 2 wks we were fine. Then he calls me this again in the car while arguing a lot of times it in front of are daughters 10 and 5 yrs old. I started calling him captain hook because he had an accident as a kid and has a hook nose. I dont want to get on his level though. I just want it to stop. Any ideas and does anyone think Im overeacting by wanted to divorce? I just dont think he has any respect for me. And for the record Im overweight but not obese. Im 5 7 and 192 ilbs size 14 i gained 35 lbs this yr. I think due to the depo shot and being older 33 Plus im on a rotating schedule in a factory One wk days 2nd wk afternoons 3wk night shift. For the past 4 yrs this causes me to eat at all weird hrs and never have the same sleep pattern. He has a desk job in the military he has no clue. I know im overweight and he's in good shape He can run 2 miles 13 mins. Hes 38 But I do more exercise than him in one 8 hr shift than he does all wk. So his comments not only hurt but piss me off Any advice Its hard to work at this job with no support