Everyone keeps saying ho to me?

On facebook guys will I/M me and say "ho" then 5 seconds later "oopps i meant to say hi" At first I thought it was an accident but then 8 other people did that "mistake" just today and then my ex boy friends girl friend did it. and then i stopped talking to one of the guys and then later they I/Med the whole "ho" thing again. Do you think it's an accident? Usually they just say hey or sup to me. idc I'm just wondering.