n. a very short time. (See also in a jiff(y).) : Just a jiffy, I'll be there.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
Cite This Source
Word Origin & History
jiffy
1785, "a moment, an instant," colloquial, origin unknown; said to be originally thieves' slang for "lightning."