WordPress at a glance
action is not described

trashed_comment action-hook . WP 2.9.0

Fires immediately after a comment is sent to Trash.

Usage

add_action( 'trashed_comment', 'action_function_name_4518', 10, 2 );
function action_function_name_4518( $comment_id, $comment ){
	// action...
}
$comment_id(int)
The comment ID.
$comment(WP_Comment)
The trashed comment.

Changelog

Since 2.9.0 Introduced.
Since 4.9.0 Added the $comment parameter.

Where the hook is called

wp_trash_comment()
trashed_comment
wp-includes/comment.php 1468
do_action( 'trashed_comment', $comment->comment_ID, $comment );

Where the hook is used (in WP core)

Usage not found!