When someone slowly digresses from having a fluent social life to having hardly no social life at all. This often occurs when someone gets a full time job (transportation company and/or police) and does not have time to attend these social functions due to untimely shift hours. Subject spends most nights at work while spending most of his free time stalking girls on facebook or myspace. Last known case was out of Salem, MA in 2008.
"I think my roommate has Collier's disease. He worked 48 hours this week and spent his only night off stalking single girls on facebook"

"Doctor, I can't stop stalking girls on facebook when I'm not at work. I think I contracted Collier's Disease"
by Kris Hansen July 11, 2008
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