Pointing with the thumb, rather than with the index finger.
Used as a variant, or when it's more comfortable (when pointing over the shoulder, for example).

Examples

• Danbooru post #9181369: Pointing with thumb + pointing at self
• Danbooru post #7350492: Pointing with thumb + pointing at another over the shoulder

See also

• pointing
• pointing at another
• pointing at self
• pointing at viewer

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