| Idiom | Meaning | Example | 
| fix you | 
punish you, get back at
 | 
"I'll fix you," he shouted at us. "I'll build a fence to keep you off my property!"
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| fix your wagon | 
hurt you, get back at, get revenge
 | 
If you make him angry, he'll fix your wagon. He'll get revenge.
 | 
| fixing to | 
preparing to, getting ready to
 | 
Andy's fixing to cut some logs for the fireplace.
 | 
| flag a cab | 
wave at a cab driver to come, hail a cab
 | 
The bus was late, so we flagged a taxi that was going by.
 | 
| flake | 
phony, not real
 | 
The salesman was a flake. What he said was phony.
 | 
| flake out | 
lie down and sleep, conk out
 | 
Grant flaked out on the couch after lunch. He was really tired.
 | 
| flap your gums | 
talk, speak, gab
 | 
Don't just stand there flapping your gums. Help with supper.
 | 
| flash a smile | 
smile at someone for only a second
 | 
Andy flashed a smile at me when the teacher asked to see his work.
 | 
| flash in the pan | 
(See a flash in the pan)
 | 
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| flat | 
not motivated, lacking energy, not up for it
 | 
In the second game, the team  was flat. They lacked energy.
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