Tulumptuous means: A group of friends in high school that is not academic. This trio of friends is a trumptuous combination that includes two close friends, and one casual friend. They are rarely seen outside the school. This trio makes it easy to laugh at the absurdity of class. The “fourth man”, a lesser-known figure, sits slightly behind the trio of tulumptuous men and makes occasional humorous comments. (in Community Dictionary, added by Lyric Berry)