ratbag
noun
slang a despicable person
Word Origin for ratbag
C20: from rat + bag
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Examples from the Web for ratbag
Contemporary Examples of ratbag
There he is smoking at Joshua Tree, milling around onstage, and palling around with his kid and dog named Ratbag.
Online Etymology Dictionary, © 2010 Douglas Harper