An analsaurus involves a very fat lady and a daring sexual mate. The man is having sex with the fat lady and decides to pull out and try to stick it in her butt very rapidly. The fat lady then becomes outraged and starts roaring at him as he keeps going deeper and deeper, thus making her an analsaurus.
I was coming home from the party when all of the sudden I heard a roar from my friends bedroom. I looked inside and he was in bed with an analsaurus.
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.