So few people would understand the reference!

I've noticed Cap, that the sports industry does a bang-up job of introducing new words into the general population's vocabulary. The sport's entheusiasts pick it up, then they use it, and others pick it up, until it becomes a commonly understood word.

I can't think of specific examples at this time - my new puppies woke me up to pee a total of five times last night so I'm a tad tired - but I'm sure folks here will have some examples.