the upper crack of the arse, usually visible when one's trousers are descending off the hip, which is readily accessible to the accumulation of lint and other undesirable particulate.
When I bent over to fix the sink, my wife informed me that my lint trap was highly visible, and that aside from the lint that I was packing, that I ought to reconsider going into the bathroom and wiping my ass another 7 times.
n. software that is no longer sold or supported by the original publisher / developer, often found as free downloads on the internet because it cannot be obtained elsewhere. Not legal, but often seen as morally acceptable because the company that made it is no longer selling the title, nor releasing it as freeware, therefore abandonware is "keeping the gamealive", so to speak.
Doom II is not abandonware because idstill sells it, while The Incredible Machine is not sold, therefore is abandonware.