A socially awkward person.
That really sheltered kid with approximately one friend who could laugh at pretty much anything you say, or nothing at all.
For other definitions:
See: Awkward Turtle
Andre: He goes here, that one is a shuggs, he stays in his room usually.
Kris: Wait a second, the kid from my class is texting me again.
Steph: Ohh is he cute?
Kris: Yeah, but he's been texting me every second for the past week. Total shuggs material.
Shuggs: Hey, what are you doing?
Lis: Who is this? How did you get my AIM sn?
Shuggs: I looked you up on Facebook, you were in one of my classes last semester.
Lis: But we're not even friends on Facebook...
Shuggs: Are there any parties, or gatherings, perhaps?
Lis: Oh jesus.