What is the thumb thing?

The "thumb thing" may refer to a variety of different things depending on the context in which it is used. It could be a slang term or a specific gesture or action involving the thumb.

In some contexts, "thumb thing" could refer to the act of giving a thumbs up or thumbs down gesture to indicate approval or disapproval. This gesture is commonly used in informal situations to express agreement or feedback.

Alternatively, "thumb thing" could also refer to a specific tool or device that is used to assist with activities involving the thumb, such as playing guitar or sewing. These tools are designed to provide support and protection to the thumb during repetitive or strenuous tasks.

Without more specific information, it is difficult to provide a more detailed explanation of what the "thumb thing" refers to.