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1.
In reference to shitting on someone's chest after anal sex. Usually in reference to anal sex between two men.
"He took his dick out and I left a woofcookie on his chest"
by Woofcookie October 10, 2009
 
2.
The art of giving anal and then jaming your hog in their mouth afterwards.
Dude, last night, I gave that bitch a nice treat. Hell yeah! I gave her a Woof Cookie
by Bassman Biff September 08, 2007