Literally translated from Latin, it means "against the world". It has been used to describe maverick, 'lone-ranger' individuals who lack interest in culture and relative comparisons made by people that the individual deems 'ignorant' (which doesn't make them wrong, necessarily).
To lack foresight. To be duped into something. To unwittingly enter into an agreement which, to the averagehuman, will result in an obvious negative consequence.
Shopper: ‘How much for this apple?’
Shopkeeper: ‘Well, normally it’s 25p however, today we are offering it at a discounted rate of 24p, if you also purchase this shiney poo sandwich for £2.49’
Shopper ponders: ‘Sounds like a bargain…I'll have 2 please’
'Munni Back'rs', or 'Money backers' in common English, are a new breed of dark skinners (mostly fat ass ugly black whores), that act all uppity, and find any lie or excuse to get their (government foodstamp) money back, by spreading lies, making life miserable for common folks.
They should all be shipped back to Haiti or Africa, where they can burn themselves.
Munni Bak'rs: 'Aye fou a bug in ma roo! I wan my munni bak'
Clerk: Sorry ma'am, but the room was bugfree before you arrived! We can only conclude that you must not have washed your ass, and that those bugs are native to your fat self!