clumpy

adjective3

1. •
   Forming or tending to form clumps.

   • 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 […] — 1859
2. •
   Resembling a clump.
3. •
   Clompy; with heavy footfalls.

   • 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. — 1920