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The term given to a sausage used to prevent the juice from baked beans touching a fried egg. Obviously only to be used for people who don't like the two items of food mixed (unlike me).

Invented by Alan Partidge, who said that his Russian wife made a good fried breakfast, good, but not brilliant, because she doesn't use the sausage as a barrier.
"Ah, no, I didn't get a barrier in my fry-up!"
Recorded on a pen microphone: "The barrier."
by marfew March 14, 2007
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