Expletive the noun is different than the adjective

I've been admittedly slow in getting back to this, but I *had* looked "expletive" up in my Concise Oxford Dictionary, and I'm still not seeing a word that I would regard either as an expletive, or as expletive.
I think I'll just assume that you meant "I still don't appreciate the innuendo" ... and you can correct me on that if you think it's important enough - assuming, of course, that you even become aware of my having (eventually) responded.

Cheers,
Rob