What does "hul" mean?

Anonymous
I met with a couple of friends a couple of days ago. They brought along some girls who I didn't know. About an hour after I left one of the girls who I hadn't met or spoken to, added me on Facebook. She said hey and we exchanged pleasantries. She then messaged me "hul". What does this mean and how would one respond?
What does "hul" mean?
3 Opinion