The Collaborative International Dictionary of English v.0.48:

Crump \Crump\ (kr[u^]mp), a. [AS. crumb stooping, bent down;
   akin to OHG. chrumb, G. krumm, Dan. krum, D. krom, and E.
   cramp.]
   1. Crooked; bent. [Obs.]
      [1913 Webster]

            Crooked backs and crump shoulders.    --Jer. Taylor.
      [1913 Webster]

   2. Hard or crusty; dry baked; as, a crump loaf. [Prov. Eng. &
      Scot.] --Hallivell.
      [1913 Webster]

WordNet (r) 3.0 (2006):

crump
    v 1: make a noise typical of an engine lacking lubricants [syn:
         crump, thud, scrunch]
    2: bombard with heavy shells
    3: explode heavily or with a loud dull noise

U.S. Gazetteer Places (2000):

Crump, TN -- U.S. city in Tennessee
   Population (2000):    1521
   Housing Units (2000): 751
   Land area (2000):     14.092780 sq. miles (36.500130 sq. km)
   Water area (2000):    0.006754 sq. miles (0.017492 sq. km)
   Total area (2000):    14.099534 sq. miles (36.517622 sq. km)
   FIPS code:            18620
   Located within:       Tennessee (TN), FIPS 47
   Location:             35.232480 N, 88.336037 W
   ZIP Codes (1990):     38327
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Crump, TN
    Crump