Fuwa fuwa (ふわふわ) means soft, light and fluffy: a cloud, a kitten, a pancake.
Japanese cafés sell “fuwa fuwa pancakes” so tall they wobble. The word on the menu is the whole promise: light as air.
What it means
ふわふわ is something so light and soft that it almost floats: cotton candy, fresh snow, a kitten's fur, a cloud. It is a happy word. You use it about things you would like to touch.
How to use it
For the state of something, add です: ふわふわです. In front of a noun, join it with の: ふわふわの パンケーキ, “fluffy pancakes”.
みて！ この パンケーキ、 ふわふわです！
Look! These pancakes are so fluffy!
いいですね！ たべましょう！
Nice! Let's eat!
Close cousins
もふもふ is the fur you want to bury your face in, a favourite word for big fluffy animals. ふかふか is soft and springy, like a thick futon or a fresh loaf you can press. ふらふら sounds close but means something else: dizzy and unsteady on your feet.
In manga and anime
ふわっ marks something floating up: a scarf in the wind, a feeling of being in love. Said about a person, ふわふわ can also mean dreamy, with their head in the clouds.
Can you use it?
Yes, freely: about food, animals, clothes and bedding. It is one of the most common words on Japanese menus and packaging.