Unfortunately, manspreading isn't going anywhere.
The term, which is just as irritating as the subway etiquette fail, is now recognized as an actual word by the publishers of the Oxford English Dictionary. The venerable dictionary dictators have released a quarterly update to Oxford's informal online dictionary, oxforddictionaries.com, including several terms that have surged into common usage in the English language -- you know, like "beer o'clock," "mic drop," "butt dial," "cat cafe," and many more.
Perhaps even more egregious than manspreading is the term "awesomesauce," which was also added to the dictionary and defined as, "Extremely good; excellent." This is a lie. You should not consider the word "awesomesauce" as, well, "awesomesauce." Ever. Mic drop.