A foul-weather friend only seeks you out if they have a problem, need a shoulder to cry on, a ride to town or someone to watch their dog, but otherwise they act as if they don't even know you.

　　Foul-weather friend(字面意思为“坏天气朋友”)只会在他们遇到麻烦、需要找个肩膀流泪、搭车进城或找人帮着照看他家宠物狗的时候才会想起你，否则，他们基本就跟不认识你一样。

　　A foul-weather friend will never call you to go out with other friends, go to a show or just go hang out, but the minute trouble comes, your foul-weather friend knows you are good old reliable you, the one who will listen when no one else will, and they act like you're their only friend. Don't expect the same in return either. When you've got a problem, they'll usually tell you not to bring them down.

　　“坏天气朋友”从来不会叫你跟其他朋友一起出去、看演出或者出去闲逛。可是，一旦遇上麻烦，他就知道你是可以依靠的老朋友，会是他唯一的听众，他们的表现让人感觉你是他唯一的朋友。不过，你可别期望他们能以同样的方式对你。等你遇到困难的时候，他们通常会告诫你，不要把他们拉下水。