Andy mocks everyone in this house including his friend Gauhar n Sangram. He was totally irritated by Tani's behavior. So he made that comment.
I donno if you remember, in one of the initial episodes, Tani told Shilpa that she didn't bring much cloths and Shilpa was consoling her telling , she has enough cloths to share with Tanisha even the MEDIUM size ones which would fit Tanisha's body. Andy then defended Tani by saying she needs small ones...medium ones are for fat people. 😆
Andy doesn't always talk like that.
Why are people comparing Andy to Armaan? Fandom blinds people or what? Arman literally bullies and abuses people. When did Andy do that? Arman is a MCP who doesn't believe in gender equality. He often says, ladkiyo ko aisa nehi karna chahiye! Bloody sexist!