The truly un-named distance between the asshole & corresponding genitalia, for men the nuts & women the pussy. Always the victim of shrapnel from sex, exercise & any other body fluid exuding activity, hence the name.
After going at it for a while her dirty inch was gettin' a littlegummy.
The anus and surrounding flesh, as it is about 1" diameter. Not necessarily clean nor dirty, it is called the 'dirty inch' because it is the excretory region on the human body.
I was doing her from behind and without warning I slipped it into her dirty inch.
When some resigns or retires from a job, they are on "eternity leave". This can also refer to someone who has passed away, especially someone who worked somewhere for a long time, retired/resigned, then passed away later.
Oh I'm sorry, you didn't know that Kelly is on eternity leave? She resigned and moved to Hawaii!
With regrets I would like to inform you that my boss is officially on eternity leave. I will never see or hear them again. Ever.
The hypothetical man (often a sinistercharacter who decided not to go to boot camp) that is doing your girlfriend/wife while you are on deployment overseas.
Ain't no use in goin home,
Jody's got your girl and gone.
Ain't no use in goin back,
Jody's got your Cadillac,
Ain't no use in feeling blue,
Jody's took your checkbook too.