ばか！バカ！　馬鹿ー月！

As the title says, how exactly would you translate a ッ! into English? The full sentence is literally 「ッ!」

What are your thoughts?

Could you please give some context to the 「ッ!」?
Who is 'saying' this? What situation is this person in?

Maybe you could post the previous Japanese sentences if it is kind of a conversation. Thanks!