썰 means 'story that the speaker has experienced'. So, if someone says '썰을 보내볼게요.', it means I'll talk about a certain topic that I have experienced. However, 썰을 보내볼게요 sounds a little awkward although the meaning can be delivered. Native speakers use 썰을 풀어볼게요 or 썰을 말해볼게요 a lot more instead. Hope this will help you out !

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