Top definition

a form of severe mental disorder, localised in the west of Scotland, in which the individual's contact with reality becomes highly distorted by MSM fairy tales stating that sevco are in fact rangers.

Classic symptoms include denial, stupidity and impotent rage. Sufferers are also given to tourette's like outbursts of random, meaningless phrases such as 'no surrender' and 'we are the people.'

Sufferers of sevcosis are to be handled with delicate care, at all costs do not attempt to correct them, as sufferers know no shame and will direct their rage at any who displease them.
Example: Wullie turned purple when he heard what pistol pete said, he has sevcosis for sure.
by oldbhoy99 November 16, 2013
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