When women use the word curvy to describe themselves it is probably an attempt to make themselves feel better that they haven't worked out in a year and have put on 15 pounds since their last relationship.
Curvy means you can wear tight clothes without or VERY few places where the shirt tucks in.(every woman has a trouble spot) Curvy means you have an exaggerated hour-glass shape. Curvy means to some men larger boobs and to others an above average sized butt. There are different kinds of women, the obese, the fat, the overweight, the curvy, the average, the skinny, the anorexic, the skeleton. There are also disproportionate women, but that is self explanatory.