subincision

[suhb-in-sizh-uh n]

noun

the slitting of the underside of the penis to the urethra, performed as a puberty rite among some tribal peoples, especially in Australia.

Origin of subincision

First recorded in 1895–1900; sub- + incision

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

But among these primitive south-east tribes, Pirrauru is no more found than subincision.
The Secret of the Totem
Andrew Lang