@TLDCAdmin
Is this similar to saying in English “That one is a liar” vs “He is a liar”? - Yes, it is like that. It is used as a put-down, i.e., to belittle or criticize, as used in that sentence.
Adults sometimes use it, too, when referring to very young children, in their presence. They "scare" them by objectifying them and thereby suggesting their helplessness against the power of the adult. For example, one adult saying to another and making sure that the child hears it, "Kap
ág hindi pa iy
án tum
igil ng iy
ák, ipah
uli na n
atin iy
án sa pul
ís" (If that one still won't stop crying, let's have that one arrested by the police"). It often works. 😄