A synonym for "That is sad" or "That makes me sad" or even simply "that sucks"
I got a D on my test. sad boosh.
Guy 1: I dropped my wallet...
Guy 2: Sad boosh
An online abbreviation which stands for "I Believe I Have Emitted An Expression Of Finding Something Humorous"
Used in the same way as "lol" but with a sense of class and etiquette
Guy 1: Did you hear? Robert E. Lee was voted "Most likely to Secede" in High School
Guy 2: ibiheaeofsh