In some online contexts, the phrase you mentioned refers to a specific hand gesture used in (such as Bharatanatyam or Odissi) or a regional finger-based game . In classical dance, hand gestures are known as Mudras .
It is sometimes used to depict a mountain peak (Shikhara literally means "peak"). indian tranny thumbs
Historically, showing a thumb in some parts of India was a playful way to say "nothing" or to tease someone (similar to "na-na-na-na-na"). Today, it has mostly shifted to the global meaning of "Good job" or "Okay." In some online contexts, the phrase you mentioned