BTJG Share definition Flag Big-Titty-Jewish-Girl.One of the main 3 best types of women out there. Guy 1: Oh my god, look at that girl in biology she's such a BTJG Guy 2: lmao xD let's tell rayan BTJG by DefinitelyNotTheGuyInFrench May 21, 2018 0 0 Get merch Get the BTJG mug. Buy Now — $32.95 See more merch