The gesture where someone places the thumb between the index and middle fingers (often shown as a closed fist with the thumb sticking out between two fingers) can have very different meanings depending on culture.
1. Offensive / insulting meaning (most common in many regions)
In parts of the Middle East, Turkey, Greece, and some South Asian contexts, this gesture is considered rude or obscene—similar to telling someone “screw you” or an insult. It is sometimes called a variation of the “fig sign”.
2. Mocking or childish insult
In some places, especially among children, it may be used jokingly to mock someone, like a playful insult without serious intent.
3. “Taunt” or “I beat you” variation (rare modern use)
Some people use it in a teasing way, similar to saying “you can’t get me,” but this is not widely standard.
Important note
Because it is commonly interpreted as disrespectful in many cultures (including Pakistan and neighboring regions), it’s best to avoid using it in public or formal situations.
If you want, you can describe where you saw it, and I can tell you the exact meaning in that context.