clumpy

clump +‎ -y

• IPA^(key): /ˈklʌmpi/

clumpy (comparative clumpier, superlative clumpiest)

1. Forming or tending to form clumps.
   • 1859, Charles Dickens, The Haunted House

     Then, I was sent to a great, cold, bare, school of big boys; where everything to eat and wear was thick and clumpy, without being enough […]

2. Resembling a clump.
3. Clompy; with heavy footfalls.
   • 1920, Eleanor H. Porter, Mary Marie

     Certainly it's lots easier to be Mary in a brown serge and clumpy boots than it is in the soft, fluffy things Marie used to wear.