the poor, the low income class

aquifer (an underground layer of water-bearing porous stone, earth, or gravel)

(politics) people who do not support specific political party; swing voters

super-rich (an extremely wealth group of people, considered a class)

“a hundred days of sermonizing, one fart” → a metaphor for how something that one has put great effort into can come to nothing after even a slight mistake, much as a hundred days of serious spiritual study can be lost to the winds