through the australian outback. A billycan had been something the aborigines boilded up their particular goodiesin, or whatever it's which they eat. Anyway, billio implies boiling things up. consequently, "my cheeks ache like billio" implies- er- really achy.we do not understand the reason we say it. Its a mystery, like numerous things. But that is the beauty of life. An exceptionally large rating of excitment from the australian outback. a billycan was anything aborigines boiled their particular goodies up in, or whatever its they consume. anyway billio means boiling things up. consequently "my cheeks ached like billio" means-er-very achy. we dont understand why we say it. its a mystery like a lot of things. but that's the beauty of life.