Originally from the
Greek, the name Testoclesius spread across the
English-speaking world during the 19th century on convict transportation ships. It first appeared in the dialogues of Plato, where it was given to a querulous urchin who mocked Plato'
s dialectical reasoning until put to death by Dionysus, tyrant of Syracuse, for unnatural acts with Dionysus' body servant.
In twelfth century Britain, a 'testaclese' was a merchant who rented out his
ass in return for money. The term survived until the time of Shakespeare, where it appears in The Tempest ('Get thee hence, thou vile,
base testaclese!'), after which it appeared to die out until reappearing on an internet
game forum in the early 21st century.
There is some dispute as to the name's exact meaning, but most probably it comes from 'testos' meaning the
male pudendum, and 'clesos' meaning 'with the hand'.