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2.
the process in which a male K-9 ejaculates.
Whoa! That dog just busted a huge killduff.
by Dan Donatelli April 16, 2005
 
1.
The name of the small town I live in, which also means K-9 load. (That German Shepard blew a huge Killduff) Killduffians refer to our lovely town as Dogpeckerjuicery.
Stop giving Sparky a red rocket, he's going to Killduff!

Sparky just Killduffed all over my leg, you dumbass! Now I have to go to the Dogpeckerjuicery to get some fresh britches.
by QueenofKillduff November 01, 2011