Where does “hitazo” come from?

hitazo (Spanish) comes from Spanish hito, from Spanish hijito, from Spanish hijo, from Old Spanish fijo, from Latin fīlius, from Old Latin fīlios, from Proto-Indo-European dʰeh₁y-li-os, from Proto-Indo-European dʰeh₁(y)- — to suckle, nurse.

hitazo (Spanish): Augmentative of hito