What does YSI mean?

You Stupid Idiot



Other definitions of YSI:

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How to use the term YSI:

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More slang terms:

KLM

KLM

Koninklijke Luchtvaart Maatschappij (Royal Dutch Airlines)

TADA

TADA

Exclamation when something is finished

ATSITS

ATSITS

All The Stars In The Sky