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2.
the act of repeatedly gaining and losing weight
If you keep yo-yo dieting like that you will never get you cholesterol down to the level you intend.
by The Return of Light Joker October 18, 2009
 
1.
non medical term to describe the act of taking off weight and putting it right back on only to begin the cycle once again....
At the funeral home Carl's friends were overheard remarking that, instead of engaging in yo-yo dieting,he should have just picked a weight and stayed with it.....
by sheila in the car June 21, 2009