A mixture of the word "smock" (refering to the article of clothing) and of the phrase "cock joke" which was popularized by Stamper from his newgrounds parody.
Smock Jesus: Hey Brandon, cock joke!
Smock God: *looks at smock* Smock Joke.
by SaintSin14 October 26, 2008
Get a smock joke mug for your mother-in-law Julia.