Answer: corker

AnswerCrossword Clue
CORKERDoozy
CORKERLulu
CORKERShowstopper
CORKERFirst-rate joke
CORKERReally good joke
CORKERReally good one
corkerperson or thing that corks
corkersomeone or something that is astonishing or excellent
corkersomething that closes a discussion or settles a question
corkerone that corks (to stop up)