Clever clogs British Australia humorous noun
Used to refer to someone who is intelligent or smart
She is such a clever clogs. She solved this tough math problem easily.
A brilliant idea or thought.
The original version was "clever boots". "Boots" was an alternative way of saying "fellow" as far back as the early 1600s. Since clogs were used in North of England many years ago, instead of saying "what a clever fellow", the expression has become "what a clever clogs".