Top Definition
To use extreme measures to get rid of excess fat in one's body, such as: liposuction surgery, drinking only water for 3 days straight, buying a Nintendo Wii and playing vigorous Wii sports games for at least 30 hours a week, totally avoiding fast-food and chips and anything packaged, eating only fruits/veggies/lean meats for a long time, and avoiding using cars if possible.
That dude should defatinate - he weighs 250 pounds and is only 5'3". and he's 21.
by Adel7 December 01, 2007

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