Hyperbole (Greek- "excess, exaggeration") is a deliberate overstatement or exaggeration, the aim of which is to intensify qualitive or quantitative aspects of the object to such a degree as to show its utter absurdity.
There was a Young Lady whose chin
Resembled the point of a pin;
So she had it made sharp,
And purchased a harp,
And played several tunes with her chin.
There was a Young Lady whose eyes
Were unique as to colour and size;
When she opened them wide,
People all turned aside,
And started away in surprise.
There was an Old Person of Buda,
Whose conduct grew ruder and ruder,
Till at last, with a hammer
They silenced his clamour,
By smashing that Person of Buda.
Hyperbole is one of The most common expressive means of our everyday speech. The feelings and emotions of the speaker are so ruffled that s/lie resorts in his/her speech to intensifying.
Skrebnev points out that linguistic means of expressing exaggeration are varied. He considers certain tautologies (pleonastic, overburdened structures using more words than are necessary to express the meaning conveyed) to be examples of hyperbole, as in the following instance:
There was an old person of Dutton,
Whose head was so small as a button;
So to make it look big,
He purchased a wig,
And rapidly rushed about Dutton.