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rat
rat-a-tat-tat
rat-arsed
rat-bite fever
rat-catcher
rat cheese
rat hole
Rat Islands
rat on
rat pack
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rat’s tail cactus
rat snake
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rat on

rat on


transitive verb 
Definition:
 
1. treat somebody untrustworthily: to betray somebody's trust, especially by revealing something told in confidence ( informal )

2. U.K. fail somebody or default on something: to abandon somebody or something, or fail to do something ( slang )

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