1) Awesome 1) Boffo 2) Deserving of a standing O 3) Gangbusters at the box office 4) Highly successful 5) Rave review rave 6) Show biz for smash 7) Show-stopping 8) Showstopping, once 9) Simply smashing 10) Smashing 11) Stupendous 12) Successful, so to speak 13) Super-duper 14) Variety rave 15) Word in a rave review 
Socko is slang for stunningly effective or successful.