This is a church every character prays at in the cinematic universe of Captainsauce within dimension TAB-5, also known as TABS. Captainsauce himself has stated that he prays to the "Wobbly Gods", and that they have brought him victory many times. He has also stated that he cannot place units in the graveyard as it is "Sacred land to the Wobbly Horse", showing that the church's graveyard is holy land, and that the Wobbly Horse blessed the units who rested there with peace and tranquility, peace which must not be disturbed.
In all seriousness, however, it is just a gag. Captainsauce says it in reference to how wobbly and flexible the knees of TABS horses are. Don't take this seriously as it is not an actual religion.