leave to the imagination
Not to reveal.
The new members of the crime organization got the most dangerous jobs. I'll leave the specifics to your imagination.
noun
The image-making power of the mind; the act of mentally creating or reproducing an object not previously perceived; the ability to create such images.
Imagination is one of the most advanced human faculties.
She removed Stranleigh’s coat with a dexterity that aroused his imagination.
Particularly, construction of false images; fantasizing.
You think someone's been following you? That's just your imagination.
Creativity; resourcefulness.
His imagination makes him a valuable team member.
A mental image formed by the action of the imagination as a faculty; something imagined.
It is a pleasant imagination to conceive a spirit iustly ballanced betweene two equall desires.
And yet the invention of young men, is more lively than that of old; and imaginations stream into their minds better, and, as it were, more divinely.