Avast there - I don't want to know wherethe expression "Heads up" comes from!
But for now I will just clew up. splice the main brace and get six sheets to the wind whilst trying to fathom it out, although it may well leave me high and dry.
It is hardly surprising really that the English language, more than any other I kno or know of, is so rich in nautical expressions given the history of Britain is dominated by 400 relatively recent years of maritime power, both in a naval and commercial sense. In my opinion, as long as it is not overdone, it adds charm and character to the language.
Aye // Stephen