The Collaborative International Dictionary of English v.0.48:

Schnapps \Schnapps\, n. [G., a dram of spirits.]
   Holland gin. [U.S.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

schnapps
    n 1: any of various strong liquors especially a Dutch spirit
         distilled from potatoes [syn: schnapps, schnaps]