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1.
From Yiddish: Knickknacks, dust collectors, bric-a-brac. Little decorative thingies you put around the house, generally bought gift shops and the like.
Oh boy do you have gorgeous chachkas!
by Tomsintown July 25, 2006
 
2.
an expensive and fairly useless trinket
Don't waste your money on those chachkas; you're never going to use them after today anyways.
by Phil Renda October 15, 2007
 
3.
noun: free merchandise
Look at all the chachka I got at the Radiohead show!
by Susan Lucas March 20, 2008