Green’s Dictionary of Slang

puffy adj.1

[SE puff, to extol]

(US) adulatory.

‘Kimagura Orange Road’ Episode 25 on UGAnime archives on University of Georgia 🌐 Kyosuke loudly decries the use of love-letters in the first place before the whole class, gives a big puffy speech (‘The future is before us! Don’t underestimate yourself! Gatchaba gatchaba goose!’) on the subject of youth.