What does it mean when guys say "woof" to girls?

Anonymous
When I was walking around my college campus earlier today, a guy walked by me and said "woof!" as he passed. Now, I was wondering if this is a negative thing, as in "Wow! She really looks like a dog!" or a positive one? I've been catcalled before and I think it's extremely immature, but I've never heard this one before, so I was just curious.
What does it mean when guys say "woof" to girls?
2 Opinion