it is a slang expressing shock or disgust about something. it is a child friendly term and can be used by kids instead of using vulgur slangs like "wtf" or gen alpha slangs like "what the skibidi".
"Tillie what in the soggy sock did you do to my dress?"
"Sora: That rap part was such a soggy sock, who considers it as art."
A pair of cum covered socks, used by perverts, furries, and weebs to jerk off again and again until said Digimon evolves into its second form...Crusty Socks. Known to reside in the land of the sheep shaggers and often has a difficult time making quality memes.
Ewww, you sick fuck... I see your pair of SoggySocks, its got blood on them, the fuck is wrong with you??!!