1. A term used to describe someone that is naive or delusional, while outwardly arrogant and self-assured. Because of this unwarranted self-assuredness, people who are beached fail to recognize their flaws. Essentially, they will forever lie on the beach of life.
2. Also used to describe douches in general; specifically the unnecessary douchey acts they commit.
1. Speaker 1: "Does that kid realize he's going nowhere in life?"
Speaker 2: "No, he's pretty beached."
2. Speaker 1: "Remember when Rich threatened to break Dave's nose over a game of Risk?"