誇こ大だい宣せん伝でん

noun

exaggerated advertising; hype; overblown promotion

Refers to promotional claims that go beyond the truth, often with a negative connotation of misleading or excessive puffery.

• その新しん製せい品ひんの誇こ大だい宣せん伝でんにはうんざりだ。

  I'm fed up with the exaggerated advertising for that new product.

• 誇こ大だい宣せん伝でんに惑まどわされず、実じっ際さいの性せい能のうを確たしかめるべきだ。

  You shouldn't be misled by the hype; you should check the actual performance.