Hindi word for arsehole. Also used to describe someone stupid and incredibly dim witted. Sometimes also used when a person is unhelpful or stingy or just plain anal. Despite certain claims, the word gandu does have a connection with homosexuality. A gandu is a homosexual man. It stems from the word "Gand", pronunced "gaa-nd" which is a crude word for someone's arse. A very popular indian curse word.
"I'm not surprised he fucked up, he is a gandu!"
"He's not going to help, he's a real gandu"