you have no ideaidiom
Definition of you have no idea
—used to emphasize an agreement with something just said "Was it hard?" "You have no idea (how hard it was)!"
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
- On Contractions of Multiple Words
- A Look at Uncommon Onomatopoeia
- Is Singular 'They' a Better Choice?