English Slang Collection：

　　flyboy

　　[释] a pilot;

　　[例] Mike considered applying for many types of jobs after graduation, but he never thought he would end up being a flyboy.;

　　fly-by-night

　　[释] sb/sth is unreliable;

　　[例] You shouldn't listen to Ricky, he's a fly-by-night charlatan.

　　fly low

　　[释] to have the zipper on trousers unzipped;

　　[例] When realizing he was flying low, Mike made an excuse and rushed towards the restroom.;

　　fly off the handle

　　[释] to become angry;

　　[例] Peter flew off the handle when he was almost hit by a car.

　　fly solo

　　[释] to do something completely by one's self;

　　[例] I'm flying solo on Halloween. Going to stay in and watch horror movies.;

　　folk

　　[释] friends or families, used for one or more persons;

　　[例] I'm now heading back home for dinner with my folks.