(1) The zone you enter or feeling you get when the alcohol starts kicking in. When you have the confidence to walk with a bounce but maintain ability to do so. The point where your 'dance' and 'game' levels reach equilibrium. And you can have fun while maintaining your swag
. Beyond tipsy
but before drunk.
(2) It may also refer to a couple flirting
or a bond/connection between them. Or when a man is making successful moves on a lady.