(1). Can be used as an adjective to describe anything superslow-brained.
"That kid is so posnav!"
(2). A camel "Hey look that posnav is carrying those middle eastern men."
(3). An affiliate of PosGang
When a bowl of marijuana has a few remaining hits before being kicked. Weed connoisseurs will empty the bowl rather than continue to smoke ashy weed. Average or younger pot smokers will typically continue to smoke a bowl that is posnered until it is completely kicked.
I was really drunk and smoked it till it was kicked. I usually repack it once it's posnered.
A musical artist who believes that many of his love interests are "cooler than" him, mostly because "they wear designer shades, just to hide" their face.
He also uses hardcore techno-esque beats to break up his songs.