Oh Tartar Sauce!! Is this a curse word??

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One day while my daughter is upset and she says Oh Tartar Sauce! Then her Dad tells me that she got it from Spongebob Squarepants. Oh yeah The Big Yellow Fellow. Then he goes on to tell me(since he watches it almost as much as they do) that it is their way off cursing. I guess it could be worse but it still somewhat bothers me. It is kind of like slang. I do feel better her saying that than Oh $hit but I would prefer for her just not to say either one. Is it overboard for me to ask her not to say it or does she even mean anything harmful by saying it or understand that is Spongebob's way of cursing. She doesn't say it often. I think she has said it like twice in the past month. But she usually only says it when she is very annoyed and upset or like when she is looking for something of hers and she can't find it. So, what's your opinions here? I feel like if I ask her not to say it if she says it again it would just be better altogether. Maybe I am wrong but I feel as if I keep letting her say it she may start saying stuff that she knows better than to say because I let this go. So share the opinions!!! Thanks a lot.