Add product description underneath the product title on an order form from Order Form for WooCommerce. Requires version 1.0.5 or higher. http://orderform-woo.webaware.net.au/

gistfile1.php

<?php

/**
* add product description to Order Form for WooCommerce product
* @param WC_Product $product
* @param array $attrs
*/
add_action('orderform_woocommerce_order_item_end', function($product, $attrs) {

    $description = $product->get_post_data()->post_content;
    echo wp_kses_post(wpautop(do_shortcode($description)));

}, 10, 2);