sock/säk/ Noun: A garment for the foot and lower part of the leg, typically knitted from wool, cotton, or nylon. Verb: Hit forcefully: "Jess socked his father". Synonyms: noun. stocking verb. strike - hit - slug - swipe
From what I understand it's a name that users create to troll with or act like an ass. Sometimes a really lonely poster will create socks so they can have conversations with themselves in an attempt to make people think they are cool
I was really hoping the next non-AgTag post would be something about how awesome coolerguy is and how he has tons of friends. Could have really solidified my explanation.