Definitions
There are 2 meanings of the phrase
Grab Bag.
Grab Bag - as a noun
An assortment of miscellaneous items
A container from which a person draws a wrapped item at random without knowing the contents
Example Sentences
"She reached into the grab bag and pulled out a small toy."
"The party favors were given out in colorful grab bags."
"The contents of the grab bag varied from person to person."
"I always enjoy the surprise of a grab bag at the carnival."
"The grab bag contained an assortment of snacks and drinks."