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1.
A polite variation of the word "motherfuck" which can be used in front of elderly relatives. Can be suffixed with er e.g. motherducker
Oh Granny! Your such a motherducker.
by James November 04, 2004
 
2.
a name for a random fake e-mail address. highly amusing :)
abi- omg! add me on iamgullable@hotmail.co.uk, iil email you :D
katt- ok :D
-recieves an email from mother duck-
katt- wtf abi :L:L:L:L
abi- i know, it was random. but i love it
katt-oh snaps :D
by motherduckrules January 09, 2008