Abbreviation of 'serious business'. First use I heard was by my daughter talking about an incident when a car hit a child on a school crossing.
Sizbiz this EU referendum.
by Geohound August 24, 2016
Get the sizbiz mug.When a person does this certain gesture with their mouths and spit comes sprinkling out everywhere. It sounds like a fast noise too.
by niby1124 February 18, 2011
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