WordPress at a glance
action is not described

wp_logout action-hook . WP 1.5.0

Fires after a user is logged-out.

Usage

add_action( 'wp_logout', 'action_function_name_7429' );
function action_function_name_7429(){
	// action...
}

Where the hook is called

wp_logout()
wp_logout
wp-includes/pluggable.php 573
do_action( 'wp_logout' );

Where the hook is used (in WP core)

Does not used.