Hook, Line And Sinker

I have always wondered what it means when someone using oral means says something so colloquial that it is understood by all except us foreigners of course yes language, it is such a force! A lady fishing from the bridge her husband though had climbed a ridge they were in heated competition and liked the thought of going fishing. A tug was felt along her line at first she felt she should recline and pull until the fish came out it probably would be a trout. It did not work and hubby yelled about the way his sweetheart held the fishing pole, she called him 'stinker' then she fell in, hook, line and sinker.