joke2 S3 [intransitive]
to say things that are intended to be funny and that you do not really mean
I never joke about money.
As we left the hospital he joked with the staff.
His father joked that his son was trying to put him out of business.
Calm down, Jo, I was only joking.
2 also you've got to be joking spoken
used to tell someone that what they are suggesting is so strange or silly that you cannot believe that they are serious:
'Tell him.' 'You must be joking - he'd never believe me.'
3 British English
used before you say something serious after you have been joking