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1.
Having unprotected sex with your girlfriend or wife and praying to Jesus that you didn't get her pregnant.
What!? You can't be pregnant again, I was wearing a Jesus Condom.
by JMU April 18, 2007
 
2.
a term used for a nonexistent condom, derived from the fact that Jesus was a virgin and therefore would not have needed a condom at all. it makes sense, trust me.

so, basically, sex without a condom.
Yeah, me and Janet hit it off with a jesus condom last night.
by asbo October 29, 2005