Blood Boy

Blood Boy is a slang term given to a younger person who regularly gives blood and plasma transfusions to older people, typically very wealthy individuals. The term, taken from a 2017 episode of the HBO series Silicon Valley in which they parodied real-world events surrounding billionaire investor and tech mogul Peter Thiel , began to be used online after startups began performing the procedure of young blood transfusions despite it often being criticized as pseudoscience and studies predominantly being done on mice.