first-rate
admirable, A1 or A-one (informal) bitchin' (U.S. slang) bodacious (slang, chiefly U.S.) boffo (slang) brill (informal) chillin' (U.S. slang) crack (slang) cracking (Brit. informal) crucial (slang) def (slang) dope (slang) elite, excellent, exceptional, exclusive, first class, jim-dandy (slang) mean (slang) mega (slang) outstanding, prime, second to none, sovereign, superb, superlative, the dog's bollocks (taboo slang) tiptop, top, top-notch (informal) topping (Brit. slang) tops (slang) world-class