Going out out is where you are going out to hit it large on a night out, you're not just out, you're going out out.

If you were going out, you might just have 1 or 2 drinks at a bar, restaurant or going to the cinema or any other recreational event, you don't tend to get dressed up as much when you're going out.
Going out out is where you would likely end up hitting up an overnight bar or club and usually involves a few drinks too many.
I only meant to go out to the shops for bread and milk, but I ended up going out out.
by Tideh April 1, 2017
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Pulling out all the stops: shaving above the knee, examining every item in your wardrobe with a fine tooth comb, checking the pedi and mani, maintenance plucking, etc.
Tonight is the big date with the hot guy from the gym. I'm "going out out."

by missikat November 30, 2008
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Going out Over Usual Time (out). In short going out out. Means that you are properly having a night out with your friends which most likely includes getting completely wasted and come back home at 6AM.
"Hey are we going out tonight?"
"Not just out man, we're going out out!"
by vglleo January 5, 2018
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