an alcoholic drink that is drunk at around the time the sun goes down

Everyone gravitates to the bar for sundowners. 大家都喜欢到酒吧喝日落酒。

By 6pm we were sipping sundowners around a campfire. 到了下午6点，我们已经开始围着篝火喝日落酒了。

a poor person who arrives at a farm in the evening pretending to look for work but really wanting food and somewhere to sleep

It's the unwritten law here. Sundowners are supposed to be sure of food and a night's lodging. 这是这个地方不成文的法律。要保证供给日没客食物和一夜的住宿。