S.O.S was a distress call that was used in MORSE CODE, long before telephones were used. To send a call for help, a telegraph operator would send " ... --- ... " It was simple and universal.
To send for help S.O.S = dot dot dot dash dash dash dot dot dot, repeatedly. If you are traped somewhere just tap S.O.S. on the wall.
by Bob Smyth February 06, 2008
sos
"Shit on a shingle," term used by individauls typically with a military background referring to creamed chipped beef on toast.
"Woah, is that brain on your bread?"
"No man, it's SOS."
by 2 Wycked Carl May 05, 2004
SOS
SOS really doesn't stand for anything, as any radio operator will tell you,

it is simply "SOS" becuase the letters S and O are very easy to understand under conditions of high interferance.

so stop saying "Save our whatever"
SOS, SOS, Titanic
by IrishRepublicanArmy October 28, 2003
Meaning "SMASH ON SIGHT"

or SHOOT,MERK,KILL,POP,BLAST,ect as soon as you see a certain person.
Guy 1. "When i see ya boy, imma S.O.S. dat nigga."
Guy 2. "You mean Smash on Sight?"
Guy 1. "Yeah nigga just walk up on him n POWW!!"
Guy 2. "Shit do what ya gotaa do"
by Y.H.DooBee November 26, 2011
An S.O.S. call is an internationally accepted Morse code distress signal. S.O.S. is sent by people on a ship when they are in danger of drowning, but I have read online that it was also used by pilots b4 they have been shot down. I don't think, though, that sailmen or pilots are the only ones who use the S.O.S. signal. Since it is an Intrnationally accepted distress code, anyone stranded and in serious trouble with no way of getting a phone call trough or any other means of communication have to relly on S.O.S.!

This signal can be transmitted in various ways. It can be sent out as an audio tone, along a telephone wire as an electrical pulse, as long or short pulses of a radio signal, or as a visual signal by using a flash light, also it could be as simple as banging on something or making some kind of noise. It is codified as three dots, then three dashes and three dots again. This sequence is without any space between the dashes and dots. The three dots signify the letter S and the letter O is formed by three dashes.
(info on this I got from reading about it on other websites and magazines.)

There are various phrases that are used as a full form of SOS. They are as follows:

Save Our Souls, Save Our Ship, Send Out Sailors, Save Our Sailors, Stop Other Signals and Survivors On Ship.
"Our only hope is that someone hears aor S.O.S. signal in time...".
"Sir, we're getting an faint S.O.S. signal from somewhere in our vicinity."
by PedaVas December 22, 2012
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