The phrase "idiotic decision" refers to a choice or action that is extremely stupid or foolish. It suggests that the decision lacks common sense and may lead to negative consequences. Full definition
From scene to scene the characters can be these brilliant strategists able to account for any scenario, but the next moment they're making idiotic decisions seemingly just so they can get caught or killed. (lylesmoviefiles.com)
The whole world can see how idiotic his decisions are. (justarsenal.com)
Believe it or not, unlike most of movies in which strip club adventures lead to idiotic decisions like the guys in «The Hangover,» it seems to work. (hollywoodchicago.com)