Deliberate or ironic misspelling of "poster," meaning a twitter user. Noun.
Alternative forms of the word include poast (n) – a misspelling of "post", referring to tweets.
It can be appended as a suffix behind other words, such as shitpoaster (n) or shitpoasting (v).
Same as post or posting as a message or a commentary posted on an internet forum. Poast instead of post follows the same pattern of transcribing "ou" diphthong as "oa" as in moar instead of more.
A poass is a certain being who posseses both the qualities of being a poser and an asshole. This type of person is largely considered to be hostile to anyone around him and to act like a douchebag constantly even though he is clearly not one and is just trying to hard.
Non-Poass: Aw yeah, I just got a quarter.
Poass: I have 3 million dollars in my swiss bank account hidden in the Netherlands of the nile desert.
Non-Poass: That place doesn't even exist.
Poass: It does if I want it to! Im richer than you!