Snapping
Turtle's HeadAdverb, Metaphor - Describes a crisis of chronic
defecation.
Example
Whist the
turtle's head (turd) is about to fully emerge from its shell, there happens upon it a sudden and quite shocking movement of the bowel.
Because the body believes that such a surge of power must surely occur DURING the ejection of the faeces, (even though the victim is retaining the load) the sphincter begins to air-spasm as if snapping the enormous delivery into manageable chunks. The resulting involuntary bodily event is euphemistically known as 'A Snapping Turtle's Head.
It was when I was a minute from my station and too late to escape using the toilet
on the train, yet knowing that there WAS a toilet at the approaching platform, that the situation turned critical, the
danger imminent! Although I had retained a calm control over the crisis I could only resign myself to the cradle of fate when my body went into SNAPPING
TURTLE'S HEAD !