ˈyo-yo ˌdieting BrE AmE noun [uncountable]
a situation in which someone loses weight by ↑ diet ing and then gains weight again, many times:
Yo-yo dieting is really bad for you.
—yo-yo dieter noun [countable]
ˈyo-yo ˌdieting BrE AmE noun [uncountable]
a situation in which someone loses weight by ↑ diet ing and then gains weight again, many times:
Yo-yo dieting is really bad for you.
—yo-yo dieter noun [countable]
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012