to flurp, from the middle english word "flurpp" possibly derived from the Latin term "phlurpus poopus." Originally used in English to describe a sound made while eating.
Quoted from: "Flurping the Brain"
by E.O. Kondiki, M.D., M.M.D.
A common problem in hypocranial neurosurgery is the accidental flurping of the brain. A spoon-like instrument is inserted between hemispheres (into the fissure) and then drawn back, in an attempt to reposition the upper surface of the longitudal cerebral cleft. If the instrument slips, it usually tosses a clump of cerebral brain matter up into the air, simultaneously causing a very audible flurping sound -- hence the term "flurping the brain." Any non-trained visitors allowed in the operating room during such an incident are sure to lose consciuousness at that point, and the medical staff then becomes distracted by stifled giggles which can occasionally erupt into full scale laughter.