Probably something like this (which is what I would use in phpMyAdmin):
DROP TABLE `####_virtuemart_adminmenuentries`, `####_virtuemart_calcs`, `####_virtuemart_calc_categories`, `####_virtuemart_calc_countries`, `####_virtuemart_calc_manufacturers`, `####_virtuemart_calc_shoppergroups`, `####_virtuemart_calc_states`, `####_virtuemart_carts`, `####_virtuemart_categories`, `####_virtuemart_categories_en_gb`, `####_virtuemart_category_categories`, `####_virtuemart_category_medias`, `####_virtuemart_configs`, `####_virtuemart_countries`, `####_virtuemart_coupons`, `####_virtuemart_currencies`, `####_virtuemart_customs`, `####_virtuemart_invoices`, `####_virtuemart_manufacturercategories`, `####_virtuemart_manufacturercategories_en_gb`, `####_virtuemart_manufacturers`, `####_virtuemart_manufacturers_en_gb`, `####_virtuemart_manufacturer_medias`, `####_virtuemart_medias`, `####_virtuemart_migration_oldtonew_ids`, `####_virtuemart_modules`, `####_virtuemart_orders`, `####_virtuemart_orderstates`, `####_virtuemart_order_calc_rules`, `####_virtuemart_order_histories`, `####_virtuemart_order_items`, `####_virtuemart_order_userinfos`, `####_virtuemart_paymentmethods`, `####_virtuemart_paymentmethods_en_gb`, `####_virtuemart_paymentmethod_shoppergroups`, `####_virtuemart_payment_plg_paypal`, `####_virtuemart_payment_plg_standard`, `####_virtuemart_products`, `####_virtuemart_products_en_gb`, `####_virtuemart_product_categories`, `####_virtuemart_product_customfields`, `####_virtuemart_product_manufacturers`, `####_virtuemart_product_medias`, `####_virtuemart_product_prices`, `####_virtuemart_product_shoppergroups`, `####_virtuemart_ratings`, `####_virtuemart_rating_reviews`, `####_virtuemart_rating_votes`, `####_virtuemart_shipmentmethods`, `####_virtuemart_shipmentmethods_en_gb`, `####_virtuemart_shipmentmethod_shoppergroups`, `####_virtuemart_shipment_plg_weight_countries`, `####_virtuemart_shoppergroups`, `####_virtuemart_states`, `####_virtuemart_userfields`, `####_virtuemart_userfield_values`, `####_virtuemart_userinfos`, `####_virtuemart_vendors`, `####_virtuemart_vendors_en_gb`, `####_virtuemart_vendor_medias`, `####_virtuemart_vendor_users`, `####_virtuemart_vmusers`, `####_virtuemart_vmuser_shoppergroups`, `####_virtuemart_waitingusers`, `####_virtuemart_worldzones`;
There may well be some entries in Joomla's modules & plugin tables, too, and other VM language tables if you use anything in addition to en.
It's all easy with the right tools.