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Sit a spell

Posted by Mal Evans on April 21, 2006

In Reply to: Sit a spell posted by Smokey Stover on April 20, 2006

:Spell in this context means an indeterminate but (usually) short length of time, at least it does in Britain.
For instance we talk about wet weather with spells of sunshine, a spell of bad luck, a spell of illness etc.
It IS in the OED by the way.