student asking question

Is "add on top" a slang?

teacher

Native speaker’s answer

Rebecca

"Add on top" here is used to mean additionally, and he is implying that there are other skills you can add in addition to the ones he has already mentioned. "On top" is not a slang term, and you can use it whenever you would use "in addition to". Ex: What else would you like to add on top of what we've already listed?

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