A word Mr Cance made up while teaching his class about fusion to be funny! He said "if we looked up the word fushion and found the definition and brought it in we'd get five points on our average!!!(duh)"
Unlike "Fashion" this refers to not just clothing but anything that may be considered "In" amongst the current fascist crowd. This can be clothing, music, speech, mannerisms, or any cultural article such as specific memes.
Seems like the green lineflag has fallen out of faschion ever since General Milley said he supported Critical Race Theory.