Fan disapproval, 6 letters
Like fans after hearing a concert's been cancelled, 6 letters
Like Philadelphia sports fans, often, 6 letters
Prompting the hook, 6 letters
Showing disapproval, 6 letters
Showing discontent, 6 letters
Showing dissent, in a way, 6 letters
Verbal disapproval, 6 letters
Shout of disapproval exactly like another?, 11 letters
Narrow passage where catcalls are heard?, 12 letters