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I grew up using "dude " as a way to refer to young boys at my age at that time. , now I prefer using the word "men " for people in my age range and also older than me , using dude for an elderly person looks weird to me

wow I used to think dude was just a slang to refer to any young man

As you've put the term out there, my brain was trying to make connections to where I've heard it before. And it reminded me of a song by Aerosmith entitled Dude (Looks Like a Lady).

I never knew that Dude is a slang until I stopped by this thread.