Winking Girl

A wink could also be used as a somewhat humorous way to express sympathy, solidarity and encouragement, especially when the winker is trying to put the receiver at ease in a situation where they might feel nervous or uncomfortable. In such cases the meaning of a wink is not unlike that of a "thumbs up".
- Sexual/flirting
In some cultures it is often a sexual interest, or flirtatious manner, during momentary eye contact. This is often followed by a smile, and usually a smile from the receiver, if it is accepted/approved, or combined with blushing if they are embarrassed. A smile from the receiver sometimes—but not always—indicates (sexual) interest in the winker.