A sailor, especially a man, who is older and/or has had a lot of experience on the seas. The bar was packed with old salty dogs who'd traveled all across the world, sharing stories of their adventures.

slang Annoyed by, upset by, or resentful of something that has been done or said to one. Of course I'm salty—you made fun of me in front of all our friends! Why is she so salty? I told her I was going to be home late!