smhid 

An abbreviation of "Shaking my head in despair".

Used in times when you really cannot believe what has happened. Perhaps used more to pity someones stupidness.

"Stu: I just got sacked from my job
Sam: HAHAHAH Why mate?
Stu: Because I created a Facebook group that slated the place.
Sam: you idiot, smhid".

smhid by Sam Cornwell May 30, 2008

SMMFHIDOA 

Shaking My Muther Fuckin Head In Disbelief Once Again

Shaniqua: Girl, you know Tyquaja pregnant by that dead beat Leroy again?

Latisha: AGAIN GIRL??? SMMFHIDOA!

SMMFHIDOA by AfricanPrince September 13, 2010

smhidb 

An elaboration on smh (shaking my head)...smhidb means "shaking my head in disbelief"

What? You mean to tell me tomatoes are not a vegetable, but a fruit? smhidb

smhidb by myClone June 8, 2011