padding put in mattresses and cushions and upholstered furniture
"After years of use, the old sofa began to sag because the stuffing inside had become lumpy and lost its shape."
The matter used to stuff hollow objects such as pillows and saddles.
"The old tailor spent hours filling the new saddle with coarse horsehair stuffing to give it the right shape."
present participle of stuff
"The workers were stuffing the bags quickly before the truck arrived."