Prejudicial

Prejudicial is an adjective which means causing or tending to cause harm, especially to a legal case. It can also be used to describe a person showing prejudice to an idea, person or group of people. It can describe something which is potentially dangerous, disadvantageous or counterproductive or in extreme cases an action or actions constituting treason.

Teenage spite monkeys are prejudicial to useful information being published on Urban Dictionary
Those arseholes in charge of Twitter tipping off terrorists that they are being investigated is prejudicial to the safety of the civilised world.

by AKACroatalin November 29, 2015

prejudicialism

Same as prejudice. To show dislike towards someone or some people based on their background or situation.

"Why do they always have to show tramps on TV as Scottish people? That's just prejudicialism!"

by Jeej May 2, 2006

Prejudicial Logic

Logic that is shaped by prejudice from the start—reasoning that begins with biased assumptions and uses logical form to give those assumptions the appearance of validity. Prejudicial Logic isn't illogical; it's logical within its biased frame. The problem isn't the reasoning—it's the premises, which already contain the prejudice. The logic then functions to make the prejudice seem reasoned, to give bias the cover of rationality.

"They constructed a perfectly valid syllogism: all members of group X are lazy; this person is from group X; therefore this person is lazy. That's Prejudicial Logic—logical in form, prejudicial in content. The logic isn't the problem; the premise is. But the logical form makes the prejudice look like reason."

by Dumu The Void February 28, 2026