Green’s Dictionary of Slang

baked wind n.

[var. on hot air n.]

(US) nonsense, rubbish; also attrib.

[US]W. Irwin Love Sonnets of a Hoodlum XIII n.p.: If I were smooth as eels and slick as soap, A baked-wind expert, jolly with my clack.
[UK]G. McKnight Eng. Words 65: Hot air becomes baked wind.