Eyelid pull
From Infogalactic: the planetary knowledge core
The eyelid pull is a gesture in which the finger is used to pull one lower eyelid further down, exposing more of the eyeball. This gesture has different meanings in different cultures, but in many cultures, particularly in the Mediterranean, signifies alertness, or a warning to be watchful.[1][2][3]
In Turkey it may mean "you do not fool me".
