clumpy

adj

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 […]”

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.”