How popular is ‘Contrafibularities’ as a day-to-day English word?

I found the phrase “My sincerest contrafibularities, Tim” given to one of the comments to my question about the word, 'Cromulent' in EL&U site.

As I was totally unfamiliar with the word, ‘contrafibularities’ (as well as 'Cromulent'), I checked Cambridge, Oxford, and Merriam-Webster online dictionary. None of them registers ‘Contrafibularities.’ GoogleNgram doesn’t carry this word either.

However, I was able to find the definition of this word as ‘A form of congratulations as used by Edmund Blackadder to mock Doctor Samuel Johnson, author of the dictionary’ in www.urbandictionary.com, and its origin;

Blackadder: "Allow me to be the first to offer Dr. Johnson my most sincere contrafibularities! I am anaspeptic ... Contrafibularities: Obviously from contra, against, + fibula, the smaller of the two bones in the lower leg. Means 'pulling one's leg,' in www.reviewers-choice.com.

I don’t understand why combination of prefix ‘contra’ and ‘fibula’ come to form the meaning of ‘Congratulations.’

But as it looks like the salute giver used this word quite casually (I think) to congratulate a comment poster, the word (contrafibularities) wouldn’t be any unusual word.

However, I would like to make sure of popularity and usability of this word. The word may be taken for granted as casually among native English speakers even among cab-drivers and burger-shop waitresses (I use these jobs just for the purpose of reffering to an average person).

But, if I speak this word in conversation with or use in writing to native speakers, am I ridiculed or jeered by them as being awkward?

The reason you haven’t found it in a dictionary is that it doesn’t exist, as a word.
As a popular culture reference, it relates to the episode of 'Blackadder' where the title character decides that the best way to annoy a man who claims to have recorded every word in the language is to use words that he can’t have recorded, because Blackadder has made them up.

(I would have thought that something that can only be found in urbandictionary is immediately suspect to the point of incredibility, but perhaps I’m unduly cynical.)

This word will only be known to some fans of the BBC television program Blackadder. Other people will give you blank looks.