When a illegal alien sneaks to the USA to have a baby for the purpose of making the baby a US citizen. The baby becomes a US citizen giving the illegal alien/bottom feeding parent and their family grounds to come to and stay in the US and become eligible for government benefits. Also called a "jackpot baby".
Pedro an worthless illegal alien from Mexico, had his son in the USA. Thanks to his anchor rat baby, now he and his whole family can leech off the US