SASE
or sase, S.A.S.E., s.a.s.e.
self-addressed stamped envelope.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for sase
I bought you, an' paid my money fer you, an' I ain't a gwine ter let you sase me in dat way.
Clotelle|William Wells BrownThey bombarded Het Sase that night, using asphyxiating shells.
Germya has the roomatiks so bad he sase he thinks he is gon this time for sure.
Hildegarde's Harvest|Laura E. Richards