1. fly (noun) =

a fly in men’s trousers
(a)
a fold of cloth that covers an opening of a garment (an item of clothing), especially the one in the front of a pair of trousers or knickers worn by men, to pass urine without having to take off the trousers
(b) a flap (a piece of cloth) used as the door of a tent

a fly in a tent
(c) a fly ball (a ball hit high in the air) in baseball game
(d) the length of a flag from the flag pole to the outer edge
(e) a single horse carriage (hackney) for hire
2. to fly (verb) = to go in the air by an aeroplane; to go from a place to another place very quickly
3. to fly at (phrasal verb) = to attack unexpectedly
4. on the fly = escaping from the police or some danger; in a hurry
5. flyleaf = a blank white page at the beginning or end of a printed book
6. fly-blown = (a) without money, penniless
(b) [said of something made unfit for use]
7. a fly on the wall =
(a) a person who watches others without being seen (unnoticed observer)
(b) a style of making (shooting) documentary films
8. a fly on the wheel [said of a person who claims responsibility or credit for what he/she has not done]
9. a fly in amber =
(a) something, such as a specimen (= a sample), preserved from long ago by an accident
(b) a strange, peculiar relic (‘relic’ = an old object which has some important connection with past history that is kept as a souvenir)
10. (a) as free as a fly
(b) as light as a fly
11. (a) not care a fly
(b) not worth a fly
12. (a) as thick as flies on a cow’s nose
(b) like flies after meat = too many in number (in profusion)
13. a fly in the ointment [said of a very minor point, fact or obstacle that spoils the whole situation; and some annoyance or a disadvantage that prevents complete pleasure]
14. there are no flies on him [said of someone who is very alert and is not easily cheated]
15. (he) takes a spear to kill a fly [said of someone who uses more force than needed to do something]
16. to go down like flies = to yield (surrender or give up), or die of an epidemic (a disease), etc. without any resistance
17. a fly has its spleen [said to mean that everyone, even an insignificant or unimportant one, is entitle to his/her feelings]
18. (he) wouldn’t hurt a fly [said of someone who is very kind-hearted]
19. to catch flies = to yawn [said of the unnecessary gestures of an actor to distract the attention of the audience from another performer, in stage performance – drama]
20. like a fly in a glue-pot/tart-box = nervously excited
21. as gaumless as a fly (‘gaumless’ = stupid)
22. summer flies are seen only in the sunshine [said to mean that when you money you have many friends and relatives]
23. buzzing around like a blue-arsed fly = unnecessarily busy
24. as fond of a raw place as bluebottle (‘raw place’ = dirty place; ‘bluebottle’ = bluebottle fly) [said of someone who tries to make profit or get benefit out of others’ helpless condition or others’ troubles]
25. to kill two flies with one flap = to complete two tasks or jobs with the same time and effort (in one go)
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