To move quickly with a whooshing sound, like the wind through the trees.
Sarsar can make people think of the wind, speed, and excitement.
Examples:
The flag sarsars in the wind.
I sarsar through the leaves.
The wind sarsars through the trees.
The rocket sarsars into the sky.
The superhero sarsars through the city, saving people.
The car sarsars down the road, going very fast.