From Longman Dictionary of Contemporary Englishtoilet waterˈtoilet ˌwater noun [uncountable] DCBa kind of perfume (=pleasant-smelling liquid) that does not have a very strong smell
Examples from the Corpus
toilet water• Instead of getting on with the business of making toilet water, he spent his time on the racecourse and worse.• Emmie opened a drawer, found a handkerchief and tipped a little of the toilet water on to it. 