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to rat out

to rat out

76 8.6
To tell the police or another authority about someone's bad action, betraying their trust
  • phrasal verb
  • /ræt aʊt/
  • Informal
translation icon : delatar
  • I hate to rat out my children, but they broke the lamp.
  • rat out a friend
  • never rat out
  • get ratted out

He was the one who ratted us out to ESPN.

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Examples

  • Are you gonna rat me out?

    Fiction book (2002)
  • Are you gonna have to rat me out now, George?

    Fiction book (1993)
  • I hate to rat out my children, my two boys.

  • Do you always rat out your friends that quickly?

  • And she rats me out to the principal.

  • And you don't rat out the people that love you.

  • If you want someone to rat out a criminal, offering them $10,000 might just do it.

    Blog text (13)
  • They're afraid I'll rat them out.

  • You ratted me out, you betrayed me.

  • They're all afraid I'm gonna rat them out.

    Fiction book (1990)

Synonyms

to tell
vsto rat out
2.7

Report someone's actions to the police or an authority

is less formal and more about personal betrayal when revealing someone
to expose
vsto rat out
342 4.1

Reveal hidden facts or bad actions to people

is narrower, focusing on reporting to authorities and breaking trust
to betray
vsto rat out
143 4.6

Tell someone's secret to other people

is about revealing to authorities specifically and is more about informing
to give away
vsto rat out
114 3.4

Tell a secret on purpose or by accident

is specifically about deliberate reporting to authorities and breaking trust
to sell someone out
vsto rat out
  • Informal
109 5.9

Betray someone by telling their secrets to others for personal gain

is similar but focuses more narrowly on telling authorities about someone
to rat
vsto rat out
  • Informal
70 8.8

To betray others by telling secret information about them

is comparable but puts stronger stress on breaking a person's trust
to sing
vsto rat out
  • Slang
70 8.4

To tell secret information to the police or other officials

is the same idea but highlights the personal betrayal aspect more
to inform
vsto rat out
41 6.8

To secretly tell the police about someone's illegal actions

is similar but focuses more on breaking personal trust when revealing
to blow the whistle
vsto rat out
37 5.1

To tell the authorities or the public about wrongdoing

is more about private informing that breaks trust rather than public duty
to snitch
vsto rat out
  • Slang
36 7.9

To secretly tell the police or a person in charge about someone's bad actions

is likewise secretive but emphasizes personal trust being broken
to tell on
vsto rat out
  • Informal
35 4.4

To report to a person in charge that someone did something wrong so they get in trouble

is similar but more about personal disloyalty when reporting someone
to denounce
vsto rat out
  • Formal
19 6.5

Tell authorities about someone, often exposing them to punishment

is more secretive and personal, focusing on betraying someone's confidence
to tattle
vsto rat out
  • Informal
8 7.0

Tell a person in charge about someone else's bad actions in a childish way

is like this but typically more intentional and adult, targeting authorities
to blow the lid off
vsto rat out
  • Literature
8 6.8

Reveal secret information that shocks people

is more about private telling to authorities and personal disloyalty
to tattle on
vsto rat out
  • Informal
5 7.5

To tell a person in charge that someone did something wrong to get them in trouble

is similar but more often used for clear, intentional betrayal to authorities
to out
vsto rat out
  • Informal
2 7.7

Reveal a secret or someone's identity

is more narrowly about telling authorities and secretly breaking trust
to peach
vsto rat out
  • Archaic
2 9.9

To tell authorities secret information about someone to get them in trouble

is similarly about telling authorities but stresses betrayal of trust more

Antonyms

1.0

To keep someone or something safe from harm

How Disloyal

to betray
143 4.6
to rat out
  • Informal
76 8.6
to inform
1.0
to tell on
  • Informal
35 4.4

Surface Forms

rat out infinitive
ratted out past
ratted out past participle
ratting out present participle
rats out third person singular

Morphology

rat + out

The meaning is partly derivable: 'rat' in its verb sense (to inform on/betray) combined with the particle 'out' (to expose) yields 'reveal someone to authorities', so the composition follows a recognizable pattern. However, the verb sense of 'rat' is colloquial/slang and not obvious from the animal noun for many learners, and the exact pragmatic sense (betrayal to authorities) may require prior exposure, making it only partially transparent to a B1 learner.

Etymology

Rat out comes from calling someone a rat — a word for a person who betrays others — and the image of pulling them out into the open so people can 'tell on' them. So, to rat out someone means 'to reveal information about them to the police or others'.