"Chal Chalan" means character, you can check that on Google, and it's a big thing for a woman to be questioned about her character. You are being an MCP if you are trying to find excuses for Deepak's words. What Deepak said to Megha, he deserves a hard beating for that. Chappal fekna aur thookna to kuch bhi nahi hai. Aur ghanta he said in flow!!! Being from a village background, he knows very well what "chal chalan" means. He deliberately used that word to piss Megha off. Kisi bhi ladki ko wo bolta BB house mein, uska reaction more or less yahi hota. Megha is not different from other women. She also has self-respect. She even told him to shut up, but he was still going on and on. Clearly he wanted Megha to get physical with him. So there is no need to cry about physical violence against Deepak. Megha actually controlled herself by not slapping Deepak.
As for the equality thing, yes, Feminism is about equality. Men and women are equal, but I'm really sorry but the real world is not so perfect like you think. That's why a women being questioned about her character is a serious issue, but it's not the same for men. Because this society judges women constantly but not the men.
Deepak ko Megha chahe kutta bole, kameena bole, audience will laugh at it, get angry over it or whatever, but they will forget it. In short, they will not take it seriously. But the close friends of Megha will remember that her "chal chalan" was questioned in BB house.
And yes, Women are weaker than men. physically at least they are. It's a fact. You can't deny that. An average woman hitting a man will not do any serious damage to him. But a full blown slap from a man to woman can land her in the hospital. That's why there is more outrage for violence against women than men.