jbdogdwsgsd is now an English word. That's what I call a peanut butter and tunafish sandwich. A word? Yes. Useful? Debatable. Widely known? No.
I am not meaning to be sarcastic, just trying to make a point -- as was my original reply.
Not one person I met in Syi An was able to write any of the variations of biang, not even the guide for the tour (for Chinese tourists) that I went on one day to out of the way spots. Nor could anyone (hotel, taxi drivers, tour guide, etc.) recommend a single restaurant that served the stuff.
The character for biang is not in any standard dictionary (nor is it part of Hanyu pinyin for standard Mandarin (biang is dialect). It is not part of the PRC's official character set which means that in the PRC you can't even use it if you wanted to (in standard publications and such). I would have to check a little more, but I am pretty sure it is not standard in Taiwan either; it is certainly not in any regular dictionary I have from Taiwan.
I was trying to make a point in my initial reply. People often talk about how many characters there are and come up with silly numbers that are misleading: 50,000, 100,000, more; such numbers are nonsensical. The average university educated person knows less than 5,000 characters in Taiwan, well under 5,000 in the PRC. Also, people often use the term simplified character inaccurately: not all the PRC characters are simplified and the overwhelming majority of simplified forms are not even used in the PRC.
What's the longest word in the English language? If educated people don't know it, then I don't care. It's just trivia. It's like someone telling me that I am wrong in saying there are three states of matter and they point out plasma. Who cares? I will never come into contact with a plasma (and there are actually more than four states of matter if one wants to be technical). The Telsa (great car) can do 155 mph for a top speed. Who cares? I would never go half that on an open road; it's too dangerous.
To quote myself: "It's not even a character, really (you won't find it in standard dictionaries or see it outside of Syi An)." {emphasis (and "a") added}