To move or follow a winding or snakelike path.
It can be fun to move like a snake, but it can also be scary if something else is moving like a snake.
Examples:
The river serpentines through the valley.
The road serpentines up the mountain.
The cat serpentines around the furniture.
She serpentines through the crowd to find her friend.
The roller coaster serpentines through the amusement park.
The snake serpentines through the grass to find its dinner.