To exaggerate is to represent something bigger than it really is.
Papyrus is still used by communities living in the vicinity of swamps
so where is the following question po?
Mercutio's dying words use a pun on the word "grave."
He says, "ask for me tomorrow and you shall find me a grave man." On the one hand, he means that tomorrow he'll be serious, or seriously injured; on the other hand, he means tomorrow he will be literally in a grave.
Mercutio is implying that, despite the wound's small size, it is a fatal wound that will kill him quickly.