英语翻译

问题描述:

英语翻译
he was observed to slip into the house and help himself to what he liked before the owner came back
怎么翻译这句话 尤其是slip

slip:溜进,鬼鬼祟祟的那种
有人看到他溜进屋子里,在屋主回来前把家里乱翻一通.
上面不是一个字一个字的翻译但是比较通顺.