In my mind it does have somewhat of a negative connotation. Two of my sisters have children with those they aren't in a relationship with anymore and they just refer to the other parent as (nieces name)'s Dad. In one case that still brings a negative connotation to mind but that is just because I don't like him (and honestly the trashy baby-daddy term would fit)
The one I hate is sugar-momma my husband refers to me like this on occasion. I hate it for several reasons. From the fact that it sounds trashy and negative to me to simply not liking that he is talking about money with people that in some cases I rather not have know about our finances (although that last one is a bit silly since just our job titles/locations are enough to let most here assume I make much more then him)
The one I hate is sugar-momma my husband refers to me like this on occasion. I hate it for several reasons. From the fact that it sounds trashy and negative to me to simply not liking that he is talking about money with people that in some cases I rather not have know about our finances (although that last one is a bit silly since just our job titles/locations are enough to let most here assume I make much more then him)