But after some googling,
I think it us abbreviated from the word sadomasochism.
The combination of sadism and masochism, in particular the deriving of pleasure, especially sexual gratification, from inflicting or submitting to physical or emotional abuse.More info at answer.com
In layman terms,
I means hitting for the sake of pleasure,
With some sexual stuff.
These guys in my class hit each other with a rotan for the sake of pleasure!
They run around hitting each other,
When one gets tired of running,
He sits down and hits himself.
I eavesdropped and heard a conversation which goes like this.
B : Big dude, the SM guy.
CKW : Some small dude who always gets bullied.
CKW : Why hit yourself, crazy ar?
B : You know or not, this one can train one, once you hit more, next time you get beat up won't feel pain.
CKW : Yes ar?
B : Yeah, and every time stop saying I bully you lah, I'm just playing with you.
CKW : ...
B : Follow me lah, you'll learn more.
Someone save me from this class before I die >.>