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to foam at the mouth

to foam at the mouth

5 8.1
To show very strong anger or excitement in a way people can see
  • idiom
  • Informal
translation icon : estar rabioso
  • Or do you just sit in your car, foaming at the mouth in fury until someone moves?
  • began foaming at the mouth

Ferrell foaming at the mouth, screaming, yelling banshees.

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Examples

  • She used to foam at the mouth.

  • I'm foaming at the mouth.

  • I was, as you might imagine, foaming at the mouth.

    Blog text (1)
  • Parents were foaming at the mouth.

    Blog text (1)
  • You were screaming and foaming at the mouth.

  • Look at you, ranting and raving and foaming at the mouth.

    Fiction book (1997)
  • He'd be foaming at the mouth like a goddamned mad dog.

    Fiction book (1990)
  • It is like they are foaming at the mouth with their eyes bugging out.

    Blog text (34)
  • Of all the words I know, there's no word that makes many of my colleagues more emotional and prone to foam at the mouth than when I'm just about to say consciousness.

  • He was so angry during the argument that he started to foam at the mouth with rage.

Synonyms

to explode
vsto foam at the mouth
187 3.5

To suddenly show a strong feeling, often anger

focuses more on extreme visible loss of control, not any strong feeling
to bawl
vsto foam at the mouth
39 5.9

Cry or shout loudly and without control

focuses more on violent visible anger or excitement rather than loud expression alone
to go ballistic
vsto foam at the mouth
  • Informal
22 7.5

Suddenly become very angry

can refer to equally strong anger or intense visible excitement
to throw a tantrum
vsto foam at the mouth
  • Informal
18 4.4

To show sudden strong anger or upset, often like a child

is broader, covering equally intense excitement as well as anger
to burst out
vsto foam at the mouth
9 3.3

Suddenly say something or make a loud sound

is about prolonged violent or visibly uncontrolled emotional reaction rather than brief speech
to burst out laughing
vsto foam at the mouth
  • Informal
8 2.4

To suddenly start laughing loudly and not be able to stop

is about extreme visible loss of control in anger or excitement rather than laughter
to froth at the mouth
vsto foam at the mouth
  • Informal
5 8.6

To be extremely angry and unable to control oneself

is similar but may also include extreme visible excitement rather than only anger
to bubble over
vsto foam at the mouth
2 4.7

To be so full of strong feeling or excitement that you show it clearly

leans more toward violent visible loss of control in anger or excitement
gush
vsto foam at the mouth
2 5.9

A strong show of feeling, often in speech or writing

is more physical and visibly uncontrollable rather than only verbal excess
to pop off
vsto foam at the mouth
  • Informal
1 8.1

To suddenly say something angry without warning

is more about a full violent or uncontrollable emotional display rather than speech
to blow one's top
vsto foam at the mouth
  • Informal
8.0

To suddenly become very angry

is like this but stresses more violent or uncontrollable display
to burst a blood vessel
vsto foam at the mouth
  • Informal
6.9

To become very angry or upset in a way people notice

emphasizes dramatic, uncontrolled outward anger or excitement rather than physical harm
to throw a wobbly
vsto foam at the mouth
  • UK
9.9

To become suddenly very angry and upset in a dramatic way

is similar but usually signals a more violent, hard-to-control display
to throw a dummy spit
vsto foam at the mouth
  • UK
9.9

Have a childish angry outburst when you do not get your way

covers extreme visible loss of control but without the childish nuance
to bristle up
vsto foam at the mouth
7.9

Show sudden anger, often by becoming tense in the face or voice

is more extreme and visibly uncontrollable rather than a sharp bristle
to bubble over with excitement
vsto foam at the mouth
3.5

Show so much excitement that you cannot hide it

can also mean extreme visible anger, not only joyful excitement

Antonyms

33 4.7

To calm yourself after strong feelings

How Angry

to foam at the mouth
  • Informal
5 8.1
to go ballistic
  • Informal
22 7.5
to anger
114 1.0

Surface Forms

foam at the mouth infinitive

Morphology

foam + at + the + mouth

The phrase literally combines 'foam' and 'mouth' to evoke a visible physical symptom, so a learner who knows those words can often infer a sense of extreme, uncontrolled agitation or anger from the image. However, the use is metaphorical and can be applied figuratively (not always literal foaming), so the relation is motivated but not fully predictable without exposure.

Etymology

The idiom foam at the mouth comes from a vivid image: animals with white foam around their mouth when they are very sick or very angry. That's why the phrase means 'to show extreme or uncontrolled anger or excitement'.