Describing a person who is two-faced- In front of his sibling, he does
naughty things but when his sibling
complains to their parent, he will lie and pretend to be a good boy and get his sibling scolded although his sibling was saying the truth. It also describes a person who his parents are biased. That person's parents will always take his side
no matter what and if he does something wrong,his sibling will be the one who suffers.