TOP DEFINITION deep dive
An in-depth or comprehensive review of a topic.
But it's also slang for deepthroat. It came up when I searched the meaning on urban dictionary website. I had a good laugh and didn't want to get band for posting the meaning of deep dive that way although it's a good tummy tickler and if that's true we should be in for an interesting C-call. Not sure if I've ever had a call like that before. There might be some stage fright.
Now out of the cupboard and praying to the gods it is good news.