Can anyone tell me the part of speech of the word “yo”? As in, “Get up off my ass, yo!” or “Yo, what is this shit?” Because the next time I hear it, I’m thinking of making the offending speaker define it, provide its etymology, write and diagram 10 sentences containing it, and then swear on pain of death NEVER TO USE IT AGAIN.
Good Lord, my job is thrilling.
one small corner of the universe 
uhm.
I’ve been known to use “yo” on occasion – but my NJ/Yankee self uses it more as a greeting, as in “yo, what’s up?” Consider it the Yankee version of “ya’ll.”
No, really.
I should also say that I often use “dude” too.
My bad.
“Yo?” What a dyslexic rabbi says?