Definify.com

Webster 1913 Edition

Adj.

[From

Noun.

]

Composed of clumps; massive; shapeless.

Leigh Hunt.

clumpy ‎(comparative clumpier, superlative clumpiest)

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 […]
Resembling a clump.
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.