This problem may involve some cultural backgrounds and contexts. In some places, "stupid turtledove" is a disparaging term for a certain kind of people, and is usually used to describe those who are considered stupid, ignorant or not smart. The word itself is derogatory, so in some cases, people will use it to describe people who they think are not smart enough or behave stupidly. However, whether to use this word or not and under what circumstances usually depends on the specific context and interpersonal relationship.