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rat

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verb rat pronunciation in British English /ræt/
Word Forms
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present tense
I/you/we/theyrat
he/she/itrats
present participleratting
past tenseratted
past participleratted

phrasal verb

rat on

[transitive]
Word Forms
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present tense
I/you/we/theyrat on
he/she/itrats on
present participleratting on
past tenseratted on
past participleratted on
informal
  1. 2
    rat on something British to not do something that you promised to do

    I can’t back someone who rats on his promises.

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… a teaching method in which groups of children learn independently using a computer linked to the internet

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