look up any word, like smh:
 
7.
smi
the sound an insect makes when it hits the windscreen
zzzzzzzzzzzzzz ... smi!
by reas October 20, 2003
 
1.
smi
sick minded individual
that person over there is a right smi look wat hes duin 2 that dog
by Nicole Hudson June 10, 2006
 
2.
Smi
A word used to describe the loading/percentage of something, particularly 18%
Everyone laughed at him because he only got a low smi of the votes.
by Clone xoxo June 20, 2011
 
3.
Smis is the word for smudding and pissing at the same time from your penis/vagina depending.
Dude I just smissed all over teh toilet seat.

Fuck that.
by greatbigflumpkin October 05, 2008
 
4.
SMI
Subject Matter Ignoramus: used to describe a manager or executive who supposedly knows "how to lead" but knows nothing about the actual business or activities he or she is supposed to manage. Pronounced "smigh" -- rhymes with "sigh".

Opposite of subject matter expert (SME).
They've hired a SMI to head up the Roads Department: the guy can't tell concrete from asphalt -- hell, he doesn't even drive.
by Jasper Ferg March 04, 2011
 
5.
SMI
Seriously Mentally Ill, a legal classification in the state of Arizona, referring to a class of individuals who meet certain psychiatric diagnostic and functional criteria.
This person is enrolled in SMI services.

The state legislature is considering additional SMI funding.
by arizona_jaguar November 26, 2006
 
6.
SMI
societies most insane
or
sick minded individual.
represent SMI bitches.
by oreo17 November 02, 2007