The Collaborative International Dictionary of English v.0.48:

Tappen \Tap"pen\, n.
   An obstruction, or indigestible mass, found in the intestine
   of bears and other animals during hibernation.
   [1913 Webster]

U.S. Gazetteer Places (2000):

Tappen, ND -- U.S. city in North Dakota
   Population (2000):    210
   Housing Units (2000): 100
   Land area (2000):     1.251960 sq. miles (3.242562 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.251960 sq. miles (3.242562 sq. km)
   FIPS code:            77980
   Located within:       North Dakota (ND), FIPS 38
   Location:             46.875903 N, 99.633648 W
   ZIP Codes (1990):     58487
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Tappen, ND
    Tappen