In the context of poker, the term “gesture” usually refers to physical actions, gestures, or facial expressions which may give away information about a player’s hand or intentions. Gestures may be intentional (attempting a bluff or trick) or involuntary (reactions to a strong or weak hand).

Some examples of gestures in poker include:

Facial expressions: A player’s facial expression, such as nervous blinking, smiling, or expressions of agitation or confidence can give clues as to their emotional state and the strength of their hand.

Handling of chips: The way a player places or moves chips, such as lifting them quickly, sliding them neatly, pushing them decisively, etc. may indicate how strong or weak their hand is.

A delay before acting: If a player thinks too long before betting or folding, this may be a sign that they're in a difficult situation, and this may give clues to their opponents.

Position at the table: Where a player sits at the table and what position they occupy may influence their gestures and actions. For example, players sitting in earlier positions usually take their turns earlier than players in later positions.

Prior behavior: Players may analyze how you behaved during previous hands to understand what kind of gestures are typical for you in certain situations.

It's important to note that gestures are not always accurate and may be a bluff. Professional poker players usually try to mask their emotions and use misleading gestures to confuse their opponents. Therefore, it’s important to assess gestures in context and with consideration for other factors such as betting structure, the player’s previous behaviour, and their overall strategy.