If you frequent any mixed martial arts forums, blogs, or social media platforms and see someone use the term “OSS” you may scratch your head and ask yourself, “what does that mean?” When looking at the meaning of “OSS” or “OSU”, it’s important to understand that the term has several uses ranging from a greeting to answering a question and acknowledging an opponent’s skill among other things. OSS it’s a pretty generic term derived from Japanese martial arts. It is…