Short for "Jewish By Insertion" or "Jewish By Injection". Refers to the status of a gentile woman (shiksa) who has had sex with a Jewish man.
Now that I have had sex with Ben, I can finally go to the Chabad parties without it being a thing, because I'm JBI.
by yaolinglingjiu February 26, 2012
by JBI Dude January 28, 2011
by JBI July 24, 2003