mystery bag

plural mystery bags

1. A bag whose contents are unknown.

   I drove home with the mystery bag on the seat beside me. I was going to do as he asked and wait until I got home to open it.

   2010, Reba D, Facing Forward - a Life Reclaimed, page 22

   1 more example

   2010, Barbara Isaacs, Sandy Green (series editor), Bringing the Montessori Approach to Your Early Years Practice, Second edition, page 43, An activity in this area, which focuses on the tactile aspects, without using visual discrimination, is the mystery bag. This bag contains sets of matching objects; the child is expected to pair them by feel.

   Synonyms: blind bag

2. A bagged package, randomly picked, which contains surprises (e.g., mystery prizes).

   Synonyms: grab bag

3. A bag from which a gift may be withdrawn (usually unseen until after chosen).

   Synonyms: grab bag

4. A non-specific mixed lot of a product at the supplier's choice.

plural mystery bags

1. AustraliaslangA sausage.

   Bully beef and spuds, tripe, fish′n chips, Anzac bikkies, damper with cocky′s joy (golden syrup), snags (or mystery bags) and hot custard and jelly for sweets.

   2010, Kathleen M. McGinley, Out of the Daydream: Based on the Autobiography of Barry McGinley Jones, page 20

2. AustraliaslangA pie.