a container or receptacle from which a person at a party or the like draws a gift without knowing what it is.
2.
any miscellaneous collection.
Origin
1850-55, Americanism
Examples from the web for grab bag
Not to be left off the gravy train, big business also pushed through its own grab bag of perks in the new legislation.
It's a bit of a grab bag, and the selection changes based on what the owners find on the market.
Earn twenty-five stickers and get a prize out of the grab bag.
Select a wetland artifact from a grab bag and learn the many functions of wetlands.
Teens bring prescription drugs from their home medicine cabinets and mix them all together in a grab bag.
He filed this timely appeal raising a grab bag of challenges to his conviction.
British Dictionary definitions for grab bag
grab bag
noun
1.
a collection of miscellaneous things
2.
(US & Canadian, Austral) a bag or other container from which gifts are drawn at random
Idioms and Phrases with grab bag
grab bag
A miscellaneous collection, as in The meeting amounted to a grab bag of petty complaints. This term alludes to a container offered at a party or fair, where one dips in for a party favor or prize without knowing what one will get. [ Mid-1800s ]