yo-yo dietingˈyo-yo ˌdieting noun [uncountable] 
a situation in which someone loses weight by dieting and then gains weight again, many times: 
Yo-yo dieting is really bad for you.—yo-yo dieter noun [countable]
a situation in which someone loses weight by dieting and then gains weight again, many times: Yo-yo dieting is really bad for you.—yo-yo dieter noun [countable]- spec
- special
- special agent
- Special Branch
- special constable
- special delivery
- special education
- special effect
- special forces
- special interest group
- special interests
- specialism
- specialist
- speciality
- specialization
- specialize
- specialized
- special licence
- specially
- special measures
- special needs
- special offer
- Special Olympics
- special pleading
- special prosecutor