Hyperbole means exaggeration. In a hyperbole things are described as being bigger or smaller than they really are. This form of style is often well used in writing to add 'flavour'.
Hyperboles are common in everyday language and in poetry.
Read on and you will see what I mean:
We have been waiting for ages.
She wept oceans of tears.
I wouldn't do that for all the tea in China!
I was hopping mad.
I nearly died laughing.
All the perfumes of Arabia will not sweeten this little hand. (Shakespeare)
When she smiled all the world was gay.
If I had to marry him I would kill myself.
Next time you write an essay why not try putting in a hyperbole or two?