now-now means you intend to do something immediatly, whereas now tends to mean you will do it soon.
"I'll do that now"
"Now-now?"
"Yes, now-now"
by Melbell August 6, 2005
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a South African term we use that generally means 'soon', but can funnily enough also mean 'never', or actually just any period of time.
scenario 1:

dad: "come downstairs, theres a rugby match between the Springboks and the Sharks on!"
me: "I will be there now now!"

scenario 2:

jack: "Jill hurry up! when will you be ready?"
Jill: "I'll be ready now now!"
by lextraordinary February 15, 2018
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A greeting commonly used in the North-East of England.
"Now then, mate, how's life?"
by Amy June 28, 2004
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To do something as soon as possible, not literally now.
Mom: Can you please clean the dishes?

Brenda: I'll do it now now!

Mom: No, do it now!
by 사실 April 16, 2017
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A phrase commonly used in northern England, it derives from Old Yorkshire dialect.

It is a phrase used for greeting, although it is laregely unknown as to why the terms "now" (meaning this instant) and "then" (meaning in the past) were put together to form another way of simply saying "hello".

Usually pronounced "Nah-then".
Now then Jack, ya doylum. How ist? Whats tha bin doin with thisen?
by jimsonkin June 8, 2011
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start doing now what you wanted to do the rest of your life
by ida c. February 10, 2007
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