The state of being in which you are so drunk that one or more of the following may occur: 1) Trouble speaking/walking 2) Throwing up 3) Being incapable of making simple decisions.
People in the danger zone are beyond being wavey yet are not quite drunk enough to need to go home.
Lewis - 'Can't believe I got with her last night, I was in the danger zone'
Dushane - 'I was in the danger zone, don't remember a thing'
Megan - 'How was your night'
Jack - 'It was good, I was flirting with the danger zone'