What is Mashbooh?

Mashbooh is an Arabic word which means suspected, if you can not decide if a food item is halal or haram than it is mashbooh an example of this is you buy some vegetable oil but it does not say 100% so maybe 10% is made from some other animal or plant but you can't find out for sure, this would be suspect.

"Halal is clear and Haram is clear; in between these two are certain things that are suspected. Many people may not know whether those items are Halal or Haram. Whosoever leaves them, he is innocent towards his religion and his conscience. He is , therefore, safe. Anyone who gets involved in any of these suspected items, he may fall into the unlawful and the prohibition. This case is similar to the one who wishes to raise his animals next to a restricted area, he may step into in. Indeed for every landlord there is a restricted area. Indeed the restrictions of Allah are the unlawful." (reported by al-Bukhari and Muslim.)