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YOSI is a slang derivative of the Tagalog word SIgarilYO (from Spanish, cigarrillo for cigarette), with its first and last syllables put together in reversed order.

cigarrillo = sigarilyo = SI garil YO = SIYO = YOSI
Huy! Mag-yosi muna tayo...

"Hey! Let's have a cigarette first..."
by Mongol Cabelin August 12, 2007
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A nazi loving jew. His parents did in the holocaust in a shower. He likes to make fun of black people saying jesus christ on a motor bike
Help me kill these jews yosi
by yosi&adam January 24, 2017
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Yosi is a very shy but once you get to know her she is very fun and crazy. Yosi is often very lost in her thoughts and lies way too much. She doesn’t have many friends. She is very sensitive and is caring but great
Hey Yosi
I’m going to space
No you aren’t
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