A slang name for Ritz biscuits as they are hugely addictive. Once you've started eating them, it's impossible to stop.
Helen has been dieting forever and never eats anything. Sometimes it's fun to offer her crack biscuits because once she's eaten one, she'll have to finish the whole pack.

Then she won't eat for two weeks and go running every day.
by English Man In...Well, London January 06, 2009
Get the mug
Get a Crack Biscuits mug for your daughter-in-law Nathalie.