backdoor bone dog 

A specific variation of the act of coppulation, where as the contributing party (usually being male) assumes a saddled position over the receiving party (usually female or sometimes domestic animal) and proceeds to "give the dog a bone" rectally.

I owned it, backdoor bone dog 180 tailside powerslide grab and rode it all the way to town.

backdoor bone dog by DirtyD November 4, 2004