OI
OI definition by Slang.net
This page explains what the acronym "OI" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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An acronym for an infection that takes advantage of weak immune systems; commonly associated with HIV and AIDS because of the havoc those diseases cause on a person's immune system; includes invasive cervical cancer, lymphoma, and tuberculosis.