beef-heart; beef verb to fart UK,1960 Also used as a noun. Rhyming slang; perhaps related to obsolete non-rhyming sense: a “bean”.
There’s farting, tooting, breaking wind, beefing, queefing [probably a nonce-term] and cutting cheese. — Peter Furze quoting L. Collingwood, Tailwinds, p. 28, 1998