A little bit

read below

"A small amount: The gesture clearly indicates that a small amount, size, or degree of something is being referred to. For example: "Add just a little salt" or "He was just a little late."

A slight difference: This is used to emphasize that the difference between objects or parameters is very small: "This option is better, but only by a little."

A gentle clarification: This helps to soften the statement by indicating that the deviation from the norm is minimal: "I don't fully agree, but only by a little."

Irony understatement: In a playful way, it can mean the opposite — the amount or difference is actually significant, but the speaker is deliberately downplaying it: "I was only a little late" (but in reality, I was an hour late).

Visual cue in teaching or instructions: It is often used when you need to accurately demonstrate the required gap, spacing, or portion, such as in the kitchen ("Pour in this much oil") or in craftsmanship ("Leave a gap of this width").

Gesture Phases & Execution

Preparation
The right arm bends at the elbow and moves upward along the vertical axis. The hand forms a closed fist, oriented to the left.
Pre-stroke Hold
The forearm is positioned perpendicular to the floor, aligned with the torso. The hand remains in a fist configuration, but the fingers relaxation-state is relaxed and do not press tightly against the palm. The palm is oriented to the left.
Stroke
With the arm bent at the elbow and the forearm aligned with the torso (perpendicular to the floor), the index finger and thumb extend to the left, parallel to each other, following the orientation of the palm. The remaining fingers stay bent, pointing downward.
Post-stroke Hold
The arm and hand maintain the stroke position: the arm is bent at the elbow, the forearm is perpendicular to the floor, and the index finger and thumb remain extended to the left, parallel to each other. The rest of the fingers are bent and pointed downward.
Retraction
The arm extends at the elbow and moves downward along the vertical axis. The hand transitions into an open-palm configuration, with all fingers fully extended and pointing downward. The palm remains oriented to the left.

a little bit