General
jam sandwich
What does jam sandwich mean?
A British police traffic car painted white with a bold red stripe running along the side. Old-school nickname that stuck even after the livery changed in most forces.
"Slow it down, jam sandwich parked up on the hard shoulder."
Origin
British nickname from the 1970s onward, when Traffic Division cars were white with a thick red (or red-and-yellow) horizontal stripe — visually identical to a slice of jam between two pieces of bread.
Frequently asked questions
What does jam sandwich mean in the UK?
It's slang for a police traffic patrol car — a white vehicle with a red stripe down the side.
How do you use jam sandwich in a sentence?
"Slow down, there's a jam sandwich parked up on the hard shoulder."
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