He was going to make a photocopy first and then, maybe he could sneak out from the office.

sneak 是动词，意思是"偷偷地移动或行动"，常带有不被发现或未经许可的含义。 out 是副词，表示"向外、离开"的意思。 sneak out 是一个短语动词，意思是"偷偷溜出去"，指在不被注意或未经允许的情况下离开某个地方。