WordPress at a glance
action is not described

comment_flood_trigger action-hook . WP 1.5.0

Fires before the comment flood message is triggered.

Usage

add_action( 'comment_flood_trigger', 'action_function_name_7090', 10, 2 );
function action_function_name_7090( $time_lastcomment, $time_newcomment ){
	// action...
}
$time_lastcomment(int)
Timestamp of when the last comment was posted.
$time_newcomment(int)
Timestamp of when the new comment was posted.

Where the hook is called

wp_check_comment_flood()
wp-includes/comment.php 869
do_action( 'comment_flood_trigger', $time_lastcomment, $time_newcomment );

Where the hook is used (in WP core)

Does not used.