Source : Webster's Revised Unabridged Dictionary (1913)

Tatty \Tat"ty\, n.; pl. {Tatties}. [Hind. [.t]a[.t][.t][imac].]
   A mat or screen of fibers, as of the kuskus grass, hung at a
   door or window and kept wet to moisten and cool the air as it
   enters. [India]