Frankly, DK Bose can be a very common Bengali name and have nothing wrong with it. But then you can write it as 'Bose DK' and it would sound like a common Hindi slang Bhosdi ke.
But if you further wanna go down the intricacies, Bhosdi in Hindi means a vagina, and if it's simply taken as 'one who came out of a vagina' there would be technically nothing wrong, but then this is taken as a slang can be for two reasons. One, as I read somewhere, that being of a female origin has not been taken in history as a 'strong' thing, even though technically it would be idiotic, and another one that I could think about was because a slut can be called bhosadi wali, literally one of the vagina. There's a possibility that bhosadi ke is understood as someone born of a slut.
Either way, I believe it's better if it's used (or rather not) just as a slang and not thought about the origins of. And the song be enjoyed.
As an update I'd like to say here to those who think DK Bose just sounds like an expletive by chance or something (there are comments suggesting that), the lyricist has explicitly added the words 'Aandhi aayi' to DK Bose, making his intentions very clear. 'Bhaag bhosdi (ke) aandhi aayi' is a commonly used slang that uses the expletive.
(For the lyrics and meaning of the entire song released, check This Post)
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