The act of inappropriately commenting on someones unfortunate Facebook status with a solitary 'lol'. A screen grab is then taken in put into a photo album titled "lol-bombs" on your own Facebook page.
"Yo, Azz, I've been lol-bombing all day so I can be just like you."
"<some sucka> has AIDS."
"<some other sucka> just saw his mum on Two Girls, One Cup"