What does the term 'quaff' primarily mean?

The term 'quaff' primarily means to drink something, especially an intoxicating beverage, in a hearty or enthusiastic manner. It conveys the idea of drinking quickly or greedily, often with a sense of enjoyment or abandon. This aligns with the chosen answer, which suggests a hurried or greedy swallowing of a drink, capturing the essence of the term.

The other options, while all related to drinking, do not reflect the vigorous and enthusiastic connotation that 'quaff' implies. Sipping slowly and carefully, drinking in moderation, or tasting delicately all represent a more restrained approach to consuming beverages, which contrasts with the more exuberant action suggested by 'quaff.'