"It's raining cats and dogs" is closest in meaning to:

If you trick someone you "pull the wool over their ..."

If someone looks really bad or sick, we might say that the person looks like "death warmed ..."

If someone knows the answer to a question, but they're having difficulty remembering the answer at that moment, then they have the answer "on the tip of their ..."

That's correct! "You hit the ... on the head"

"I'll buy the groceries after I pick up the surfboard from the surf shop. That way I'll ... two birds with one stone."

Scott's amazing! "He's one in a ...!"

"All the boards and snorkel gear are in the car, right? Great! It's time to .. the road."

"Oh, nothing important. I just called to ... the breeze." (Hint: small talk)

That was completely unexpected. "The car came like a ... out of hell."