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.
One week of assistance, and kitties take right to a litter box. Since he is one month old, you can begin offering him canned kitten food. When he gets used to it, decrease the milk until he is eating a lot of solid food (2-3 ounces) and drinking water out of a shallow bowl.