Pushing Rope is when you are banging a girl all night, either repeatedly or multiple times, and finally your rod craps out on you. Instead of thrusting with your best foot (member) forward, you are instead pushing a limp noodle, hence the term, you are pushing rope.
This can also be referred to the term "whiskey dick", full sail, no wind (as you have full intention, but no control of whats going on)
Suzy and I were so into it last night, we were banging till I was pushing rope!
Buddy, I was so wasted last night, I was pushing rope.
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.