| Idiom | Meaning | Example | 
| one false move | 
one move to get away or call for help
 | 
"One false move and you're dead," the gunman said to his hostage.
 | 
| one fell swoop | 
(See in one fell swoop)
 | 
 | 
| one for the money, two for the show... | 
prepare to go or run, children's countdown
 | 
Before bedtime, Dad would say, "One for the money..."
 | 
| one for the road | 
one drink or kiss etc. before you leave
 | 
If you have one for the road, have a cup of coffee (or a kiss).
 | 
| one hell of a time | 
one very difficult task, one major problem, a hell of a time
 | 
I think that bull knew we were taking him to market. We had one
hell of a time getting him into the truck!
 | 
| one man's garbage is another man's art | 
each person has different likes and dislikes, to each his own
 | 
You pick up what somebody throws away, so one man's garbage is another man's art.
 | 
| one man's meat is another man's poison | 
one person likes what another person hates, to each his own
 | 
Some people love his music; others hate it. One man's meat is another man's poison.
 | 
| one of the boys | 
a typical member of the group, a regular guy
 | 
Roger is one of the boys, eh. He's always ready to play or help.
 | 
| one on one | 
one player against one player
 | 
I like it when the coach lets us go one on one in soccer practice.
 | 
| one-track mind | 
tendency to think about only one subject
 | 
My son has a one-track mind these days. He thinks only about cars.
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