Same here Kolya. This is what we heard as kids back in the 1940's:
Polish Church, Slovak Church, Irish Church, German Church, Uhorsky Church [Ruthenian Catholic], Nasha Tserkva [Ukrainian Catholic], Kicker Church [Polish National and Ukrainian Orthodox Church], "Toe Kissers" [Ruthenian and Ukrainian Greek Catholics as referred to by Ukrainian Orthodox] and "Whitewash Catholics [Episcopalians/Anglicans]..
As we grew into adulthood we realized that "Kicker Church", "Toe Kissers", etc. were terribly derogatory. Fortunately, a thing of the past.