What exActly did Gulati say to Tanna?

All that i hear was him calling her "gandi ladki". I took it in a literal way and am not aware if it has some other meaning. But the way all other house mates are reacting, it appears he said something really bad. Everyone seemed pretty upset, so it must be something really nasty i suppose.😕

Even I am wondering the same.. Aisa kya bola usne..

I think kuch boht hy bura word bolo ho ga gautam ny

of course that was something not ear appealing! hence all were against gautam!