All of the above, particularly the use of adjectives as nouns as in "your best beautiful", find your happy" etc. And I'm glad I'm not the only one who objects to being called a "guy". Hate groups of children being called "guys" too.
My particular pet hate which hasn't been mentioned yet afaik is the word "source" in the context of "look for". Particularly on those rather pretentious cookery/design television programmes. It's no longer enough, it seems, to just go out and buy something, or google it on amazon. It has to be "sourced" as if acquiring something is a spectacularly clever skill. (unlike popping to the supermarket, lobbing said item in the trolley and whizzing it through the checkout, which is what most of us do).
Arggh!