YMMV
= Y =
You know you've been hacking too long when
You are not expected to understand this [Unix] cav.
The
canonical comment describing something magic or too
complicated to bother explaining properly. From an infamous
comment in the context-switching code of the V6 Unix kernel.
Dennis Ritchie has
explained this in detail.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.