What is "rush center"

Population (2000): 176
Housing Units (2000): 99
Land area (2000): 0.386379 sq. miles (1.000718 sq. km)
Water area (2000): 0.000000 sq. miles (0.000000 sq. km)
Total area (2000): 0.386379 sq. miles (1.000718 sq. km)
FIPS code: 61775
Located within: Kansas (KS), FIPS 20
Location: 38.464881 N, 99.310903 W
ZIP Codes (1990): 67575
Note: some ZIP codes may be omitted esp. for suburbs.
Headwords: