YOYO
n.— «It’s my opinion that some politicians in our area live by what I call the “YOYO Doctrine”; in other words, “you’re on your own.”» —“The Deval’s In The Details” by Bob Parks American Daily Aug. 3, 2006. (source: Double-Tongued Dictionary)
Further reading
A magnificent new book celebrates the richness and diversity of 450 years of written and spoken English in what is now the United States. It’s called The People’s Tongue, and it’s a sumptuous collection of essays, letters, poems...
If you want to describe people who have an overly high opinion of themselves, here’s some handy Spanish slang: In Argentina, you might describe such a person as Tarzán de maceta, or “Tarzan of the flowerpot.” You might also call...