look up any word, like tribbing:
 
1.
In World of Warcraft, it means that an item is ungivable to anyone else. Quest rewards and phat l00t are nearly always bind on pickup, meaning that the only way to get rid of them is to sell them.
"WTB Thunderfury and Sulfuras, PST."

"Fucking idiot, they're soulbound."
by Hadranos September 05, 2006
 
2.
When an item like Krol Blade becomes attuned to your very soul. The weapon then only accepts you as its true user because like a chick, it gets very clingy.
I equiped my new leggings of tenstorms and when they became soul bound it was better then sex, which is good since i dont have a girlfriend.
by Shige May 07, 2006