This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

ad. In a dismissive manner

"It is unfair, unreasonable and ill-mannered to demean someone who has dedicated much of her career to NASA; you display remarkable ignorance in dismissively asserting that Lori Garver is a "political opportunist"."