douche in sheep's clothing
a cleverly deceiving type of douchebag that by all outward appearances seems normal, but do not be fooled this type of douchebag has had years to mask his douchiness. When this type of douchebag encounters other douchebags they tend to display douchey behavior.
I never in suspected that Chad was a douche in sheep's clothing, but look at him over there with those douchebags talking about the lastest Ed Hardy shirts and new pokemon games.