Green’s Dictionary of Slang

an outpouring of speech, an ‘earful’.

1932		‘Ex-Légionnaire 1384’ With the Secret Service in Morocco 11: We asked the Germans why they had enlisted after all, and received a bibful of guttural curses in reply.
1937		A. McLean Vive la Legion 40: ‘Listen, Buddy, I’ll maybe tell you a bib full later. Not now’.

(US) to eat.

1938		A.I. Bezzerides Long Haul 53: Here come the eats; let’s put on the bib.
2005		Sydney Morning Herald 12 May 🌐 Bono recently turned up for dinner at Gates’ $40 million-plus mansion [...] Apparently Gates is also a U2 fan, and after seeing the band in concert, invited Bono home to put on the bib.

(Aus.) to interfere, to intrude; thus the reverse, keep one’s bib out.

1953		T.A.G. Hungerford Riverslake 220: Those bastards in the office got no business poking their bibs in and helping him.
1963		(con. 1944) L. Glassop Rats in New Guinea 139: ‘Keep your bib out of this, Groucho,’ I snarled.
1968		S. Gore Holy Smoke 52: He’d have probably had the sailors’ union to reckon with if he’d gone stickin’ his bib in.
1986		C. Bowles G’DAY 81: Before long someone else will stick their bib in, and [...] some bloke decides to go the knuckle and gets done over.
2000		S. Maloney Big Ask 162: All I know is that you were sticking your bib where it didn’t belong.