thumbs-down

A gesture is a form of non-verbal communication made with a part of the body, used instead of or in combination with verbal communication. The language of gesture allows individuals to express a variety of feelings and thoughts, from contempt and hostility to approval and affection. Most people use gestures and body language in addition to words when they speak. The use of gesture as language by some ethnic groups is more common than in others, and the amount of such gesturing that is considered culturally acceptable varies from one location to the next.
See more at Wikipedia.org...

For the Chinese newspaper, see Thumbs Up (newspaper). For the Indian Cola drink, see Thums Up A thumbs up or thumbs down is a common gesture represented by a closed fist held with the thumb extended upward or downward in approval or disapproval respectively. These gestures have become metaphors in English: "My boss gave my proposal the thumbs-up" means that the boss approved the proposal, regardless of whether the gesture was made — indeed, the gesture itself is unlikely in a formal business setting.
See more at Wikipedia.org...

n. การไม่เห็นด้วย (syn. rejection)