Re: Alley Oop!
It can be spelled – alley-oop, allez-oop, allez-up, ally-oop.
According to the Oxford English Dictionary, it was first recorded in 1917 (but therefore must have been around for longer than that.)
I imagined that it would have been one of the words brought back by British Soldiers in the 1914-18 War, but was surprised to find it is American –
1917 B. S. Walcott Let.
9 Sept. in Princeton Alumni Weekly 6 Feb. (1918) 389/1, I fortunately found a spark plug on the burn and got that repaired and alley oop!
"There are no rules in English, only guidance. Some guidance looks like a rule; it probably isn't."