“put a sock in it”别理解成“把袜子放进去”，真实含义是别出声；住嘴；安静。

【例句】
Can't you put a sock in it when I am on the phone?
我打电话的时候你能不能安静点？

Hey, put a sock in it, will you? I'm trying to work here.
嘿，别出声，好吗？我正在这儿工作呢。