Hostia
Originally the sacramental wafer given by priests during communion, the term also means a hard blow or a slap. This likely stems from the fact that physical punishment was the other thing clergy frequently gave to children in the name of God. The definition clarifies that other interactions between certain priests and minors were not done in God's name. (Hostia refers to the Eucharist wafer used in Catholic Mass).
If you do not shut up, I am going to give you a hostia.
Automatically translated from Spanish
España