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.
