1. poast - Noun
2. poast - Verb
Obsolete form of post.
(humorous, Internet) A post on an internet site, especially associated with being "terminally online" or causing mischief, or other such tomfoolery.
(humorous) To post on an internet site. [from early 21st c.]
Source: en.wiktionary.orgPublished in the journal International Organization, Poast produced his latest study in partnership with political scientist David Carter of Washington University in St. Louis. Source: Internet