Complex sentence: "Anchor baby" is a pejorative term for a child born to a noncitizen mother in a country that grants automatic citizenship to children born on its soil or to children born in the United States to immigrants.
Split into simpler sentences: Anchor baby is a pejorative term for a child born to a noncitizen mother in a country that grants automatic citizenship to children born on its soil. The term is often used to refer to children born in the United States to immigrants.