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1.
All purpose word for use as a swear word or for an unidentifiable or indescribable emotion.

Invented and spread by the members of the infamous band PunkinPie.
"Shni! I slept through my final!"
"Shniiiii! That girl is so annoying!"
in conversation:
"How do you feel?" reply: "Shni" <shrugs shoulders>
by Key Lime March 09, 2004
 
2.
1. a very safe driver, who never does anything even remotely un-safe

2. one who can only shoot basketball into net when net is lowered
shni, yur speakers are shit.
by buttman November 30, 2004