It is a simple procedure that sometimes initiates labour, reducing the risk of babies being born over the due date (42 weeks of pregnancy). A fist and twist releases hormones which prepares the cervix for birth and sometimes initiates labour.
Adj was booked in for a second fist and twist after the Dr's first outing had not satisfied her.
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.