When a new York nigga is dead serious

equivalent to saying: for real; im serious; telling the truth.

A slang for serious to be used in any scenario;

Completely serious.

A term used by timbs wearin ass Brooklyn niggas that means serious.

"Deadass" is a word primarily used by teens, or New Yorkers who have a Timberland obsession, and usually spend their time in Brooklyn or the Bronx, this word means "seriously" or "for real" to any other American.

Sometimes used as a synonym of "literal" used in contexts where literal wouldn't work quite right.