Top Definition
a foolish braggart

true origin is a comedy by Nicholas Udall called "Ralph Roister Doister" written a.1553
Roister Doister is my name,
A lusty brute I am the same
by pooglem July 27, 2007
bit of a "player"; generally with women but can also be used in business. Origins - Only Fools and Horses.
"Rodders, I'd never of guessed, you ol' roister doister."
by adrian daniels March 17, 2005
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