(That clip doesn't actually feature the word herbidacious but never mind, it's made me realise that Parsley the Lion's mane is green like, er, parsley. I must only have ever watched The Herbs in black and white!).
Anyway, -acious words: gracious, audacious, vexacious, efficacious - and it's always a pleasure to come across a new one like minacious.
It means threatening: but, of course, it's generally much better not to threaten, but to promise.
Thing Not To Be Today: minacious. This word comes from the Latin minax, from minārī, to threaten.