joke:
(plural: ‘jokes‘)
any person (thing or event) that is laughed at and not taken seriously, usually an innocent or incompetent person,

You’re a joke!
Tom is a big joke in our office; nobody takes him seriously.
It’s a common practice for politicians to insult their opponent by calling them ‘They are a bunch of jokes’, and the opponents retort by saying ‘They have no originality; they copy us!’
Carried away by the over-whelming response from his staff and share holders at the annual meeting, the President of the company went too far in his speech, cracking some jokes and, in his over-enthusiasm, revealed some malpractices the company has practised to attract new customers, which made him and his associates ‘jokes’ before the public.

[a joke (cartoon) on how to reduce motor accidents on roads]
