It helps to keep in mind that a person’s written or spoken English is correct if other English speakers -- some, not all -- correctly interpret the words as having the communicator’s intended meaning.
I invite you to show any evidence that anyone else has ever used "sopping to" in this sense. That's exactly my point.
In addition the "verbing with a noun" is a red-herring. Sopping has meanings related to being small or wet/absorbent. So, you could verb that noun all you wanted and succeed only in confusing your audience. That's the best thing to keep in mind: are you communicating or obfuscating.