So I have been hearing this construction quite a bit recently but couldnt find it in any of the dictionaries that I commonly use to look up things.
So I was wondering just how common it really is and if its only used in very colloquial speech or extends to other areas as well. Then I have also heard "to be down for" but Im guessing this is simply used whenever a noun is needed (to be down for "it", whatever that may be) and is identical in meaning to the other phrase.
Learn English – Is “to be down to do something” grammatical and common usage
grammar
Best Answer
From Oxford Dictionaries ( https://en.oxforddictionaries.com/definition/down ):
So, "down to do something" means on the list to do something, or scheduled to do something, or otherwise committed to do something.
As for "down with", it's a well known colloquialism. From the same source:
And from Merriam-Webster ( https://www.merriam-webster.com/dictionary/down ):