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Most Common American Idioms
## 883. On the same page
## 884. On the spot
## 885. On the spur of the moment
## 886. On top of the world
## 887. On the up and up
## 888. On the warpath
## 889. On thin ice
## 890. Once and for all
## 891. Once bitten, twice shy
## 892. Once in a blue moon
## 893. One fell swoop
## 894. One-trick pony
## 895. Open a can of worms
## 896. Out of date
## 897. Out of left field
## 898. Out of my hands
## 899. Out of order
## 900. Out of the blue
## 901. Out of the frying pan and into the fire
## 902. Out of the question
