The no no zone refers to the intimate area between your legs. It was popularized when youtube user Overboard Humor produced numerous videos in which he said funny Youtube comments to strangers in public.
Among the said Youtube comments in the videos was: "I like to rub salsa on my no no zone."
The no-zone is when either you don't want to talk to someone or they don't want to talk to you. If someone friendzones you, instead of complaining about it, you can no-zone them and feel much better. Then you get a different girl to actually be your girlfriend. You can also chill out with your other friends.
I totally put that girl in the no-zone after she friendzoned me, and got another girl to be my girlfriend. I talked with my other friends about it and they said "put her in the no-zone".
1. not within any of the three New York City flood evacuation zones (A, B, or C), and therefore, COMPLETELY IMPERVIOUS to all hurricane/flood/storm/apocalypse hazards ever
2. atmosphere pollution caused by CFCs
"I've got a no-zone 4th-floor apartment you can crash in. Hurricanes? Fuck hurricanes."