This adjective means both "bloody" & "cheerfully optimistic"
1. cheerfully 
optimistic ... sanguin < Latin sanguineus bloody, equivalent to sanguin-, stem of 
sanguis... [DOC] [TLE] sangui-, sanguio-, sanguin- - Word Information [PAR] sanguinary (adjective), more sanguinary, most sanguinary ... it means that he or 
she is hopeful, confident, or cheerfully optimistic about it.