Performing a flying fuck

At our students' graduations this week, a colleague told me about a (non-canonical) ballet step which, because of the particular way that it's performed, is called the Flying Fuck. 

(As an aside, we had a conversation about how many of the names of dance steps are bodily, sexual or generally risqué, something that is also true of one of the types of dance that I do.)

So as you probably know, there is an expression, I don't give a flying fuck. It means that you don't care at all. For anyone who's using this blog to learn English (ill-advisadly, maybe), it's pretty rude so go carefully. 

In this expression, a flying fuck is what linguists would call a Negative Polarity Item or NPI. These are words that don't sound grammatical in a sentence without a 'licensor', often a negation, hence the name. So we can say (1) but not (2), where there is no negative word in the sentence to license the NPI and it sound really weird: 

(1) I don't give a flying fuck about his career prospects. 

(2) *I give a flying fuck about his career prospects. 

There are actually more licensors than just negation. Lots of NPIs can be licensed by expressions like exactly two. We can see this with another NPI, any: 

(3) *Some people have eaten any salad. 

(4) Exactly two people have eaten any salad. 

NPIs are tricksy and puzzling. There are several different theories to explain why they work the way they do, all of which are appealing in some way, and none of which quite satisfy completely. For example, some theories of how NPIs work predicted that flying fuck would not be licensed by exactly, as it's what is sometimes known as a 'minimiser', but it actually sounds ok to me: 

(5) Exactly two people give a flying fuck about his career prospects. 

I think this fact would be predicted under what seems to me to be the most widely-accepted (current) idea, however, which is known as 'non-veridicality' and is essentially about (4) being more specific than (3), though in more technical terms than that. 

But especially interesting to me is the fact that because this is the name of a ballet step, the exact same expression can completely lose its NPI status, and doesn't need licensing at all: 

(6) They performed a perfect flying fuck.

(7) The dance opens with a flying fuck. 

I like this sort of almost-literal interpretation of the expression to repurpose it for the name, at which point it becomes just a bog-standard phrase like any other. 

The literature on this is very fun to read, by the way, because it's full of phrases like I don't give a flying fuck so I recommend it.