A hit dog will holler is a popular idiomatic phrase used to signify that a very averting reaction to an accusation is an admittance of guilt.
“A hit dog will holler” was coined by Samuel Porter Jones, when the entire phrase “Throw a stone into a crowd of dogs and the hit dog will holler” was published in The Washington Post during the 1880’s.
The phrase became widely known during the 20th century, and it has been used in all sorts of settings in the last century, which include novels, speeches, and television shows.
It was first defined on Urban Dictionary in 2009.
The popularity of “A hit dog will holler” shot up in October 2018, when First Coast News broadcasted footage of a debate, where Ron DeSantis was passionately defending himself against accusations of being a racist, to which Andrew Gillum responded with the idiomatic phrase.