disguise (someone or something) as (someone or something)
To cause someone or something to look or seem like someone or something else. Unless you plan to disguise yourself as a potted plant, there's no way you'll be able to sit in on that meeting. I think that statement was just anger disguised as sarcasm.
disguise someone or something as someone or something
to dress or make someone up to appear to be someone or something. We disguised the child as a witch. We disguised Gerald as a pumpkin.