In Shakespeare's play "Romeo and Juliet," when Tybalt asks to have a word with Mercutio, Mercutio responds with wit and sarcasm. He says, "But one word with one of us? Couple it with something; make it a word and a blow." This means that Mercutio is not afraid of Tybalt and is willing to engage in a physical altercation if necessary. His response also shows his arrogance and his desire to demonstrate his bravery and quick wit in front of his friends.