In 'Seinfeld', what fictional holiday did Frank Costanza create?

In 'Friends', where do Ross and Rachel get drunkenly married? In 'Friends', where does Ross marry Emily? In 'The Office' (U.S.), what is the name of Dwight's paper company rival that Michael starts? In 'Seinfeld', what does Elaine do when she dances? In 'Seinfeld', what phrase ends the show's "Soup Nazi" character's refusals? Which series follows a chemistry-teacher-turned-drug-lord's lawyer as a prequel? Which Netflix series follows a financial advisor who launders money in the Missouri Ozarks? Which Netflix series dramatizes Pablo Escobar's drug empire?