mingleberry
The act of mingling in a crowd, but in an undesirable fashion. Acting much like a human dingleberry whereas the mingleberry attaches oneself to a group of people against there wishes. Removal of the social nugget and be akward and sometimes painful. Accessories may include a Blackberry.
Person 1: I wish this asshat would go away.

Person 2: Yeah me too, what a mingleberry.