who cut the cheese?, phr. — Green’s Dictionary of Slang

who cut the cheese? phr.

[the smell associated with some soft cheeses]

(orig. US, usu. juv.) who broke wind?

1970		(con. 1950s) H. Junker ‘The Fifties’ in Eisen Age of Rock 2 (1970) 100: Who cut the cheese? [...] he who smelt it dealt it.
1985		‘Thommo’ Dict. Aus. Swearing & Sex Sayings 31: CUT THE CHEESE — To fart or pass wind.
2000		C. Hiaasen Sick Puppy 250: Aw, who cut the cheese [...] Your damn dog passed gas!