The term 'D'Urberville Lass' refers to Tess, the protagonist of Thomas Hardy's novel 'Tess of the d'Urbervilles'. Tess is a young woman from a poor family who is seduced by a wealthy man, Alec d'Urberville. She is then forced to endure a life of hardship and tragedy as a result of her relationship with him. Tess is a strong-willed and determined character who ultimately finds redemption and peace.