Green’s Dictionary of Slang

bib n.

SE in slang uses

In phrases

put on the bib (v.)

(US) to eat.

[US]A.I. Bezzerides Long Haul 53: Here come the eats; let’s put on the bib.
[Aus]Sydney Morning Herald 12 May [Internet] 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.
stick one’s bib (in) (v.) (also poke one’s bib in)

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

[Aus]T.A.G. Hungerford Riverslake 220: Those bastards in the office got no business poking their bibs in and helping him.
[Aus](con. 1944) L. Glassop Rats in New Guinea 139: ‘Keep your bib out of this, Groucho,’ I snarled.
[Aus]S. Gore Holy Smoke 52: He’d have probably had the sailors’ union to reckon with if he’d gone stickin’ his bib in.
[Aus]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.
[Aus]S. Maloney Big Ask 162: All I know is that you were sticking your bib where it didn’t belong.