Any object that when inserted into the mouth brings oral pleasure; excitement of the taste buds. Also commonly referred to as a "schmook." A jagoop could be anything from chewing tobacco to "schmookie good" food.
Let's go watch some football and get a big ole jagoop.
Someone who combines the finest attributes of being a jagoff and of being a robot and evolves into a composite royal pain in the ass. They are typically found in supervisory positions. They have black hearts and eat unicorns.
A mythological supernatural entity (demon, spirit, deity, etc.) whose purview is primarily to reduce the quality of films made under his influence; an anti-muse.