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.
I rescued two 8 week old kittens-both brothers. Apparently very healthy, playing, sleeping, using the kitty litter box. One is eating the dry kitten chow and drinking water. The other kitten is refusing to eat or drink. However, the one that is refusing to eat the dry cat food or drink the water, will drink milk.