Why loogies?

Well, it just happened again. After feeling like
I was choking for about 5 minutes, I hacked up
something about the size of a human lung (well,
maybe a human tooth is more like it). I do this
often enough to be really annoying.

What are these nasty things for?

I didn’t realize that my 12 year old daughter was such a tom boy until she came home and reported that she had to show the new boy from Texas how to “Hock a loogie”