What does lamo mean on facebook?

:)

"Lamo" *might* be a term for someone who is "lame"(or uncool, etc), ie: "lame-o"...

But it more likely is in reference to LMAO - Laughing My Ass Off, which either you or they have misspelled with a typo(to get "lamo")...

my best guess anyways :D any others?