Not that anything will ever be as fun as listening for others in my vicinity to drop "a whole nother," but my favorite weird language thing is the appearance of innapropriate quotation marks in printed material. Although, actually, sometimes people accomplish innapropriate quotation marks verbally as well, through the use of "quoty fingers" - another amusing phenomena.
So, what I'm interested in here is quotation marks that appear for no reason. These often work to obscure the intended meaning to comic effect, at least if you're a punctuation nerd. Not that i know anyone like that.
The most recent example I have is from the Hope Summer Repatory Theatre program in one actor's bio. Something like you may remember his "hips" from last year's production of Bye Bye Birdie. So... were they not real hips? (maybe they were so not real)
Feel free to uncover and report your own examples in comments.