1. or not - Particle
2. or not - Phrase
or not
(Singapore, Malaysia, colloquial) Final interrogative particle, forming a yes/no question from a declarative statement.
Emphasizes that a particular claim or idea makes no difference regarding what can or has happened.
A sardonic response to a new event that contradicts what the speaker has just stated.
"I bet the green car will make it unscathed!" said Mildred. Suddenly, there came a loud crunch from the racetrack. "Or not," she sighed.
We must love everyone regardless of whether or not they love us; that is their business. Ephraim of Arizona
God is everywhere. You decide whether you are close to Him or not. John Chrysostom
Remember that man lives only in the present, in this fleeting instant; all the rest of his life is either past and gone, or not yet revealed. Marcus Aurelius
A man without happiness is either not good or not well. Mexican Proverb
Speak well of the dead or not at all. Polish Proverb
God will be present, whether asked or not. Latin Proverb