"source of mockery" is a correct and usable phrase in written English.
You could use this phrase when talking about something or someone who is the target of ridicule or derision. For example, "His unusual fashion sense was a source of mockery among his peers."
Boyd and McArdle don't exculpate Richard; what they make clear is that he is an outsider ("misshapen Dick") whose deformity has been a lifelong source of mockery and who has grown up in a corrupt ethos of insatiate crown-hunger.
First introduced on the Acela amid a heavily promoted marketing campaign two years ago, its press release promising "fast, reliable and consistent connectivity," Amtrak's wireless service has instead turned into a source of mockery on blogs and a daily source of angry messages on Twitter and other social media.
When Brown carried that shotgun into his offices, he set in motion a chain of events which would not only drastically alter his life but also become a source of mockery until his death -- and beyond, it would seem.
Mark Lawrenson's choices are the source of constant mockery from his fellow MOTD pundits, but the words "fine one to talk" spring to mind.
Doctored images of officials making inspection visits have become a source of popular mockery in China, particularly after the discovery of one distinctive image that showed a group of functionaries hovering over a road in Sichuan.
Crucially, this main source of this mockery is not the West.
Trump's focus on cyberbullying as part of Be Best has long been the source of criticism and mockery, given her husband's regular stream of Twitter attacks.
Around my house, I'm the source of near-constant mockery for my ability to be nostalgic for virtually anything that happened before right now.
On the Road – the film as well as the book – tells the story of a time when that kind of thing was dangerous and threatening as opposed to just a source of amusement and mockery.
His pre-snap routine of shouts and hand gestures has been the source of both imitation and mockery, but its effectiveness cannot be doubted.
The stereotype of the happy Negro, initially a form of self-protection, has become a means of self-mockery, itself a source of humor.
