Green’s Dictionary of Slang

(Aus./N.Z. juv./US campus) to break wind.

c.1943		S .J. Baker Aus. Vulgarisms [t/s] 9: fluff: To fart.
1968		G. Slatter Pagan Game (1969) 160: He always won the fluffing contest in the Prefects’ Room, his Rory Aforesaid being judged superior to Mike Donnelly’s Whiz-buzz.
1987		Eble Campus Sl. Fall.
1991		R.G. Barratt ‘Dr Doug Meets His Match’ in What Do You Reckon (1997) [ebook] He had fluffed on prime-time TV.
2003		McGill Reed Dict. of N.Z. Sl.