AIUI
AIUI definition by Slang.net
This page explains what the acronym "AIUI" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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AIUI, AIUI stands for "as I understand it." This acronym prefaces someone's opinion or understanding of a topic. It's similar to the much more commonly used AFAIK.
Most often, people use AIUI when they are not sure their opinion or understanding is correct, to allow for the possibility they might be wrong. People may also use AIUI out of politeness, when they're sure they're right, but don't want to rub it in your face.