put words in/into someone's mouth idiom
曲解（某人）的话，故意歪曲（某人）的话
to suggest that someone meant one thing when really they meant another
Stop putting words in my mouth - I didn't say you looked fat in the red dress - I merely said you looked very slim in the black! 别曲解我的话——我并不是说你穿红色显胖——我只是说你穿黑色显得非常苗条！