The phrase "source of ridicule" is grammatically correct and can be used in written English.
It can be used to describe something or someone that is constantly mocked or made fun of by others. Example: Her unusual hairstyle became a source of ridicule among her classmates. They would often tease her and imitate her hairstyle, making her feel embarrassed and self-conscious.
Even the Knicks' outsized payroll, long a source of ridicule, has become less ridiculous.
My Mary Poppins bag is a constant source of ridicule.
She became a source of ridicule, Miss Do Little.
Hibernian's failure to win the Scottish Cup since success over Celtic in 1902 is a constant source of ridicule.
"Fox & Friends," which walks a tricky line between news, entertainment and commentary, has been a source of ridicule by the network's liberal critics.
Johnson, once a source of ridicule, has now been transformed into an awesome figure of terror for the majority of England's cricketers.
In the hands of Delafield or Sayers these details might be sources of ridicule, but Jesse doesn't want to poke fun at Julia, she wants to understand her, and the novel's authority comes from the precision with which she captures Julia's milieu, the expanding metropolis of the early 20th century.
Since then his stock has plummeted like a bad punt on the FTSE, to such an extent that his nickname, Mr Cricket, has become a source of minor ridicule rather than a badge of pride.
The Wildcats were the source of much ridicule, in both my personal circle and the world at large, when I left for college back in 1994, but two years later, I found myself cheering, in purple, at the 1996 Rose Bowl.
That was scored by a player who was the source of some ridicule on social media when the teams were announced before the match.
The Stephen Crane story, as it became known, soon became a source for ridicule; the Chicago Dispatch in particular quipped that "Stephen Crane is respectfully informed that association with women in scarlet is not necessarily a 'Red Badge of Courage' ".
