The story
A deliberate alteration of wheat + biscuit. A trademark owned by Sanitarium Health and Wellbeing Company, used in Australian English from the 1920s onwards.
Etymology from Wiktionary, CC BY-SA 4.0.
Weet-Bix
Today it means: A breakfast cereal sold in Australia and New Zealand, consisting of biscuits of compressed wholegrain flakes. Full definition →