The tier just under tipsy. About three drinks in for new drinkers. You are flowy when it feels like every motion you do seems to happen in a fluid motion, faster than normal. Probably linked to the neuronic reactions being altered when alcohol is in the mix.
Dude 1: You drunk man?
Dude 2: No, not at all.
Dude 1: You sure? Not even tipsy?
Dude 2: I think I'm a bit flowy man.
Dude 1: Well that's not good enough! Bring on the booze!