Fluffy; a mimetic word describing something soft and puffed up (e.g., fur, blankets, clouds).
寒いのでモコモコのセーターを着て出かけた。
Because it was cold, I put on a fluffy sweater and went out.
新しい毛布がモコモコして気持ちいい。
The new blanket is fluffy and comfortable.
子犬がモコモコと丸くなって寝ている。
The puppy is curled up, looking all fluffy as it sleeps.
Lumpy; describing something that is uneven, bulging, or has rounded protrusions (e.g., puffy clothing, bulging muscles).
洗濯するとセーターがモコモコになってしまった。
After washing, the sweater became lumpy.
寒さで手袋の中がモコモコして温かい。
The inside of the gloves is padded and warm.
運動で胸筋がモコモコと盛り上がってきた。
With exercise, his pectoral muscles have started to bulge.