Form of coprophilia practiced by lesbians in the United Kingdom. One partner defecates into the other's vagina, which is held open, often with the aid of a speculum. They then proceed to suck their feces back out of their partner's vagina and ingest it.
Vanessa was eagerly clarking some nice steamy nuggets right out of Sarah's minge.
The act of catching a shart before it touches cloth, by tightly clenching one's buttocks to contain the inadvertently expelled matter. A successful stench clench, followed by an immediate stealthy bathroom visit, can save one from the ignominy of having shit oneself in public.
Damon and Bill watched bemused as Bob silently waddled towards the restroom, holding his stench clench tightly.