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2.
an altar boy or catholic choir boy who likes to suck the cocks of other altar boys, choir boys, and especially priests.
choir boy: Patrick stayed pretty late with Father O'Brian last week!

altar boy: Yep, Patrick is having a broman catholic cock sucking session with Father O'Brian!
by joseph catho March 27, 2009
 
1.
A particularly "chill" Catholic-an individual whose crucifix necklace is only visible because he needs to unbutton his yellow polo in order to pop the collar.
Q: Yo man Is Marty a baptist?
A: No man he's chill, he's Broman Catholic.
by Doctor Hate June 19, 2007