The phrase "derisory of" is grammatically correct and can be used in written English.
It means to mock or make fun of something or someone in a scornful and disrespectful manner. Example: The politician's speech was derisory of his opponent, making snide remarks and belittling their ideas.
Exact(2)
The only way to get ahead in TV fashion is to be anti-fashion, to be derisory of a whole industry and to emerge self-righteously unaffected by it.
(Any Mexican smallholder, sowing a dozen varieties of corn to cope with any contingency, would be derisory of agribusinesses' reflex of entrusting all its seeds to one genetic basket).
Similar(57)
America's foreign aid is 0.1% of GDP, a derisory shadow of what it used to be, and roughly one-third of the European level (see charts).
The liberals, who looked west for their models, could not take seriously Solzhenitsyn's derisory view of the West as a trove of useless materialism and a wasteland of spiritual emptiness.
The United States is nearly at the bottom of the pile, spending a derisory 0.1percentt of G.D.P.
In October 1894 Captain Alfred Dreyfus was arrested on the charge of high treason, accused on derisory evidence of revealing French military secrets to the Germany embassy.
While a poll last month found that a derisory 16% of those over the age of 60 think Jeremy Corbyn is doing well, the figure rises to 41% among 18- to 24-year-olds.
The France midfielder was also left out of the 4-0 defeat by Manchester City in the wake of what Newcastle deemed a "derisory" offer of £10m from Arsenal.
You have to subject yourself to various chores and humiliations under the ominous threat of being "eliminated," for a derisory amount of money.
He was allowed just one hurried post-confession interview – a derisory snatch of evasive blather, which makes all of Gibney's intimate pre-confession interviews look creepy and pointless.
The state Somalia is in results primarily from the folly and abject failure of its leadership, as well as the derisory efforts of the international actors.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com