Flabbage: a made-up word reflecting the fact that the human brain is mostly fat and water.
PPP: PPP stands for physiology, psychology and philosophy, a degree taken at Oxford (at least in my day) by 'non-medics'. In Years 2 & 3 you take a number of courses in two of the three options. Psychology is usually chosen, as its content is 'mid-way' between the other two, and can be made more or less philosophical (or physiological) by selecting appropriate courses. The physiology/philosophy combination is so rare that in my first term as an undergraduate I was taught psychology and philosophy instead; the tutor who'd admitted me was away and no one else believed my claim to be doing the weirdest two Ps. I must have been mad.
The European Enlightenment, usually considered to have been at its height in the eighteenth century, was the period during which reason and individual liberty, rather than tradition and custom, became social priorities. Religious authority waned, political revolutions established democracy, and secular and scientific ways of thinking became established.