Fusdar is an acroynym, combining FUS for fucked-up shit and DAR from radar to describe the ability in certain individuals to seek out and find a way to do very stupid, ignorant, rude, basically fucked-up shit.
Examples: 1. Picking out the restaurant or place of business that is about to close to 'patronize' and staying well past closing time, keeping employees from going home is a way to use your FUSDAR. 2. Going into a movie on opening night, packed theatre, and talking on your phone for the whole movie is a way to use your FUSDAR. 3. Getting drunk at the club and going home with the only cross-dresser is a way to use your FUSDAR.