Verbal irony is when what is said is the opposite of the literal meaning. One type of verbal irony is sarcasm, where the speaker says the opposite of what he or she means in order to show contempt or mock. Other types of verbal irony include overstatement (or exaggeration) and understatement.
Thanks for A2A. There are two excellent, well-informed answers here, so I'll just try to simplify. Dr. Falconer is of course correct; pre-weaning age (about 9 weeks or younger) kittens can drink cow's milk, or any milk. Neonates are not lactose intolerant; this develops gradually with age.
Age of Weaning. Most kittens are fully weaned when they are 8 to 10 weeks old. For their first three to four weeks, kittens rely solely on their mother's milk for nutrition. Cat food is slowly introduced and increased in their diets until they are fully weaned from milk and eating only cat food.