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.
その新製品の誇大宣伝にはうんざりだ。
I'm fed up with the exaggerated advertising for that new product.
誇大宣伝に惑わされず、実際の性能を確かめるべきだ。
You shouldn't be misled by the hype; you should check the actual performance.
「誇大」（exaggeration）と「宣伝」（propaganda, advertising）からなる複合語。