Someone who engages in inappropriate, silly, or dumb behavior, usually innocently. Derived from 'Goofus' in the Goofus and Gallant stories in Highlights for Children.
I was such a goofus for keeping my cell phone on during the movie.
He/she was a goofus who thought of himself/herself as Sho nuff or somebody else like Sho Nuff from either a differentmovie (or a living person they admired).
A goofus often dedicates every minute of every day to being a gangster or something similar (and usually thinks other peoplelive the same way as them, or wants to be the same thing as them).
He/she spent his/her entire life trying to pull the strings of other people who were were too uptight to be in that life only gangsters knew. He/she was good enough at it, you wouldn't even think he/she was ever a goofus.
The kind of person who sets up anything from a robbery to a fight (and if they made a dollar by putting it on a show on tv like punk'd, that's what they would try and do).
The girl wanted to put brad pitt, johnny knoxville, and see man in a video but for some unknown reason (if there was a reason at all) decided to try and put local folk in her goofus set up).