А по версии словаря сленга honks - это "сиськи".

И вариации:
The sound you should make when you squeeze one or both of a chick's breasts, preferably while in public.

А также:
A person who is so blindly devoted to something or some person/group, especially regarding sports, that they continue to stand their ground no matter the opposition.

Но это все не точно, потому что словарь "народный".