Yeah man, 'Stranger nuh know where di deep water in di pass' – it literally sayin’ a visitor, a foreigner, wouldn’t know di safest, deepest parts of a river or gorge. It really meanin’ you can't truly understand a place or a situation until you experience it yourself, you know? A yardman would seh it when someone from outta road tryin’ give advice on something dem nuh really understand. Bless up.