Discussion Forum—A Way with Words, a fun radio show and podcast about language

Some dictionaries do mark it as "informal" which is as close as modern dictionaries will usually get to calling anything "slang." Even given that, I knew I was riding the line when I chose it for the puzzle. But I went ahead with it because I thought it was unusual enough for most people that, whether one thought it was slang or not, it was still an interesting choice.