lit. from the French meaning 'double meaning.' a phrase or saying that has another connotation apart from the literal, almost always sexual in nature. A staple of the British 'carry on' series of films of thr 1960s and 70s, and the most excellent 'Bottom' TV show of the early 90s on the BBC
Rectus sheath. The rectus sheath is made up of two parts, known as the posterior sheath and the anterior sheath. These sheaths are made of fibers of the transversus abdominis, internal abdominal oblique (IAO), and external abdominal oblique (EAO), which are muscles of the abdomen.
The rectus abdominis muscle, also known as the  abdominals or abs , is a paired muscle running vertically on each side of the anterior wall of the human abdomen, as well as that of some other mammals.There are two parallel muscles, separated by a midline band of connective tissue called the linea alba. muscle strain occurs when the muscle is stretched too far. When this occurs the muscle fibers are torn. Most commonly, a strain causes microscopic tears within the muscle, but occasionally, in severe injuries, the muscle can rupture from its attachment.