literally, knock-out basoomas; breasts that are so huge you might want to watch it when you are around a girl who has them because they could knock you out.
Careful if she turns around too fast, she's got a serious pair of kob's.
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.