POSI

POSI could mean:Posi, a youth movementPlace of Special Interest, a term used in archeologythe Pipe Organ Society of Ireland
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Straight edge refers to a lifestyle and scene within the hardcore punk subculture whose adherents abstain from alcohol, tobacco, and other drugs, as well as casual sex. The latter is sometimes overlooked, but it was a value in the original definition of straight edge. There is considerable debate over what constitutes a straight edge lifestyle, and some may also abstain from caffeine, follow a vegetarian or vegan diet, and refuse to take psychiatric drugs. The term was coined by the 1980s hardcore band Minor Threat. Other bands from the 1980s which promoted straight edge philosophies included 7 Seconds, SSD, and Youth of Today, while bands from the 2000s include Good Clean Fun, Casey Jones, and  Throwdown.
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v. put, place, set, lay, pose; put oneself, place oneself

v. put, put down, set, set down, place, lay; land, alight