The Collaborative International Dictionary of English v.0.48:

Crouse \Crouse\ (kr[=oo]s), a. [Etymol. uncertain.]
   Brisk; lively; bold; self-complacent. [Scot.] --Burns.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Crouse
    n 1: United States playwright (1893-1966) [syn: Crouse,
         Russel Crouse]