Noun
a grammatically substandard but emphatic negative
an affirmative constructed from two negatives
Source: WordNetDuring a lecture the Oxford linguistic philosopher J. L. Austin made the claim that although a double negative in English implies a positive meaning, there is no language in which a double positive implies a negative. To which Morgenbesser responded in a dismissive tone, "Yeah, yeah." Sidney Morgenbesser
I don't never go Source: Internet
A not unwelcome outcome Source: Internet
The double negative construction has been fully grammaticalized in standard Afrikaans and its proper use follows a set of fairly complex rules as the examples below show: The Dutch word het ("it" in English) does not correspond to het in Afrikaans. Source: Internet
Negation uses the word nie, before the verb or other item being negated; nie is still added before the verb even if the sentence also contains other negatives such as nigdy ("never") or nic ("nothing"), effectively creating a double negative. Source: Internet
The double negative (disproving the null hypothesis) of the method is confusing, but using a counter-example to disprove is standard mathematical practice. Source: Internet