The sock that a teenage boy or man uses to ejaculate in when masturbating, usually hiding the item of clothing under his bed, in his closet or in some other discreet location. The sock is used because it catches all of the ejaculate and negates the need to to clean up after jerking it, a convenience when jerking it in bed before he falls asleep. The word is a portmanteau of the phrase "skeet in" with the words sock and soggy.
Joe: "I couldn't fall asleep when I went to bed last night so I jacked it. But once I came, I passed out with my nut all over my stomach."
John: "Dude, that's why I keep my scoggins under my bed, I just grab it and nut in that so I don't need to get up to clean off."
Joe's mom was upset her son hadn't picked up his room, so she went in and grabbed the laundry off the floor. She even found his scoggins under the bed.