If you've ever watched old movies
on TV, you may have heard a character exclaim, "You dirty rat!"
The word "rat" has a number of uses in English, none of them very
For example, "to rat on" someone is
to tell someone in authority about another person's misdeeds. If
you do that, someone might call you a "rat."
Another use is "to smell a rat,"
meaning that you suspect the other person has done something
Finally, because rats often run in
mazes in scientific experiments we have the use "rat race, " which
means to go mindlessly along without thinking, just like a rat in
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