grounded
Explanation
This comic shows a mother confronting her young son Billy, asking "So, Billy, what you're saying is you told me a lie today." Billy meekly confirms and asks "Am I grounded?" Instead of a normal punishment, the mother screams "ACTUALLY LOCUSTS!" -- implying she is going to unleash a plague of locusts on him. The final panel, labeled "Earlier...", reveals the mother reading a book titled "Bible-Based Parenting."
The joke is that the mother has taken the concept of "Bible-based parenting" far too literally. Instead of applying general biblical moral principles to child-rearing (honesty, respect, etc.), she is using the actual punishments from the Old Testament -- specifically the plagues of Egypt from the Book of Exodus, where God sent locusts as one of the ten plagues to punish Pharaoh. The comic satirizes the concept of overly literal biblical interpretation and the "Bible-based parenting" genre of self-help books. The escalation from a child telling a small lie to receiving a biblical plague as punishment is the core absurdist humor. It also plays on the common parenting trope of looking up discipline strategies in books, taken to a hilariously extreme conclusion.