Describes someone who, after spending his childhood/adolescence/young adulthood being labelled "socially awkward" by insecure peers, finally gets his shit together and through experience learns how to be the life of the party.
Hey, remember that kid Lance who never knew what to say about the latest Jersey Shore episode? He was, like, soooo socially awkward.
No, he's socially awesome now, I totally saw him last weekend at the bar and he was telling the best jokes to a group of 50 people.