If one of your friends attempts to make a clever or funny status but fails, and after 72 hours it has no likes, you like it. Doesn't mean you actually like it, just a benevolent act to make the status seem less depressing and cheer the person up.
yeah, i kind of feel bad though. probably going to sympathy like it so he doesn't hang himself
To "like" a friend's status update or video/picture upload on facebook not because you actually like it, but because you feel sorry that no one has commented or liked it after a long time has passed.
Facebook User#1- Did you see that gross new picture of Christina in a bathing suit she added on facebook last week? She has really let herself go!
Facebook User#2- Yeah I can't believe she uploaded that for the world to see! But shes a nice girl so I sympathy liked it.