One of any faith who states they belong to a religion, but frequently goes against that religion's own beliefs.
Bro 1: Did you hear Cathy is on birth control?
Bro 2: Yeah, but isn't she Catholic?
Bro 1: Well, I guess she's an oxymormon now.
a term used to describe a person who follows the ways of Joseph Smith but tries really hard to be something else and fails miserably. Some examples-- Mormon Slut, hard Drinkin Mormon
A feminist mormon is an oxymormon
A mormon who acts in a way noncompliant to the ways of the Mormon Church.
A: Did you see her at the club? Short skirt, and about three guys hanging off her? Isn't she a MORMON???
B: Nah, she's an OXY-Mormon.
A: *Smiles and nods knowingly*
A member of the Church of Latter Day Saints (Mormon Church) who is either a liberal and/or progressive in their political views.