1. Cuban word, to imply that someone is a "mother fucker, "asshole," or a "bastard." It is the noun form of the cuban verb "singar," which means "to fuck." Vulgar. Also see Singa(f).
Spanish: Tu eres un singao!
English: You are a mother fucker!
Cuban slang for someone who is generally selfish, screws others over in order to get what he/she wants, and a son of a bitch.
Random: Don't use spanish words when you're talking in English. It sounds Mexican.
Ñooo ese tipo si que es un tremendo singao