Babanaaj
A term for someone who acts like they know what YBMY means, but they're just making it up as they go.
"Babanaaj is when you say YBMY but you don’t know what it means.", @YBMYExpert
"She called me Babanaaj. I told her I was a real YBMY.", @RealYBMY
"He's a Babanaaj. He thinks YBMY is a brand.", @YBMYFanatic