Top Definition
A progression of the nickname Wullie, often the nickname is a natural follow on from wullie to wullster in later years of ones life. Many nicknames find the "ster" tag added as we grow up.
As a boy we called him wullie but at some point around the drinking and shagging part of our lives it changed to wullster.
by Michael J Williamson July 11, 2006

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