One who likes long things up ones buttocks. The term comes from a mid 1990's gay porno movie called "De-headed The Cobra" and the term for sticking things up the buttocks was used alot in the movie
or one who likes to have sexual confrontations with animals.
"OMG!!! He just got sun cobra'd"
"That Sun-Cobra owned my cheeks"
"That dude just sun-cobra'd my dog"