It is a saying based on the disease rabies - the idea is that a rabid animal often has foamy saliva dripping from its mouth. This has somehow gotten associated with being mad as in angry, so now you say that if someone is really angry, they are foaming or frothing at the mouth.
He was hiding from a scary man and held his breath for so long his lungs burst and he frothed at the mouth...
What does it mean when a bee is in your mouth
A babycino is a drink of frothed milk without coffee, which is available in some coffeehouses.
A babyccino is a drink of frothed milk without coffee, which is available in some coffeehouses.
His mouth is called a 'mouth." But if you mean the combination of his mouth, lips and nose (basically everything below the eyes) then you mean the 'muzzle.'
It means mouth. :)
A counterfeit crank is someone from the Tudor times who would pretend to have a epilepic fit so that other people woulf feel sorry for him. Basicly a beggar begging for atention. The counterfeit crank would eat soap so that he frothed from the mouth and writh around on the floor.
It just means that they have a soft mouth.
penis in the other person's mouth
It may mean they have a flavor in their mouth that they don't like
mouth
I could mean watch your mouth or what you mean.