smi 

sick minded individual

that person over there is a right smi look wat hes duin 2 that dog

smi by Nicole Hudson June 11, 2006

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.

Smi by Clone xoxo June 20, 2011

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.

SMI by Arizona Jaguar November 26, 2006

SMI 

societies most insane
or
sick minded individual.

represent SMI bitches.

SMI by oreo17 November 23, 2007

smi 

the sound an insect makes when it hits the windscreen

zzzzzzzzzzzzzz ... smi!

smi by reas October 20, 2003

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.

SMI by Jasper Ferg March 19, 2011

smi 

Severely mentally impaired. Someone who is retarded as shit and can help it.

what are you doin' smi? Hot carls go on another person, not yourself

smi by john schlongo August 22, 2003