"a slight hunch" is a correct and usable phrase in written English.
It is typically used to describe a feeling or suspicion that someone has about something, often without much evidence or proof. Example: Sarah had a slight hunch that her coworker was hiding something from her, but she couldn't pinpoint what it was.
Adopting a grimace and a slight hunch, Feldshuh sang, "Hey!
Fellow-Zuni, always recognizable somehow — something in the bend of their legs, the lope of their gait, a slight hunch in the back of the older ones, a confusion of reverence and weariness).
You stand with a paper tray in one hand, legs spread to shoulder width, a slight hunch in your back as you lean over the tray to avoid spillage on your shoes and shirt.
Because of the flying robots high above in the darkening sky, unseen but never far from people's minds, Saeed walked with a slight hunch, as though cringing at the thought of the bomb or missile that one of them might at any moment dispatch.
Those rounded shoulders, a slight hunch, the hovering-over-a-desk-all-day slouch -- if this sounds anything like you, it's time for a wake-up call.
While he is making a demonstration, Mira is sitting on the ground, while Alfons and Hai are leaning against the wall in a slight hunching position.
There's a record player and a collection of jazz albums, and there, suddenly, in the gloaming, is Woody himself, who, give or take a whitening of the hair, and slight hunching of the shoulders, seems equally timeless.
Mystic Bob has just the slightest hunch it won't happen.
Drummond also wants the outgoing runner's arm to be back and turned slightly out, a slight adjustment from the norm, where runners hunch over and unnaturally throw their hands behind them.
They don't, of course, but by hunching her shoulders slightly and keeping her knees in a slight crouch as she alternates between strutting and scampering around the stage, Ms. Hunter convincingly conveys ape-ness.
In the late nineteen-twenties, Alfred Knopf, on a hunch, contracted Fergusson to write "Dancing Gods," a guide to indigenous rituals that became a slight national phenomenon.
