nah 1 Posted in N Best definition nah 1 nah 1 which derived from the saying “nice one” it indicates that something good has just taken place. dunny how pissed are u? ” i know man! nah 1″ How satisfied are you with the definition? Looking for nah 1 meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 75 times.