When you just so happen to be in a situation where an understandable stench masks a less socially acceptable one emanated within close proximity.
Roger: "Hey Dano, check it out. I just broke wind while I was talking to that cop, but we were standing right by the sewer, so I was covered by stinkronicity"
When one is lying stoned on the couch, and has a hornygirlfriend who won't stop bugging them, the insertion of the middle three toes into the vagina while the big toe stimulates the clitoris and the small toe tickles the taint and anus often helps.
This is followed by the insertion of the big toe deep intoo her cameltoe to draw out the juices. Often followed by a root.
I wasn't in the mood to plunge, so I did stinktoe.
When two people people, most like stoners, come to a general understanding that they will smoke and then bone each other. can be a term used with friends with benefits or simply with your girlfriend or boyfriend.
"Stonebone tonight?"
"Hell ya, you bring the blunt, and I got the condom".