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.
Because human baby formula is made from cow's milk, it is high in lactose. While a newborn kitten can digest lactose, which is also found in a mother cat's milk, kittens lose that ability shortly after they are weaned. For this reason, a kitten or cat should also not be given cow's milk.