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2.
Your housemate. In kind with noobie/newbie (a new comer to something); matey/matie (a friend) et al.
My Housie is a Newbie.
by Chorna January 02, 2007
 
1.
adj Used to describe anyone who has a stable living situation, who is dependent upon their house or apartment. Often used to describe people who have "normal lives" but still hang out with gutterpunks, train-hoppers, and street-rats in their spare time. Slightly affectionate to extremely derogatory, depending on context.
"Man, that chick isn't part of our crew, she's just a fuckin' housie."
by Jenaka July 04, 2008