Found 2 items, similar to billyo.
English → English (WordNet) Definition: billyo billyo n : an unimaginably large amount; "British say `it rained like billyo' where Americans say `it rained like all get out'" [syn: billyoh, billy-ho, all get out]
English → English (gcide) Definition: billyo billyo \billyo\, billyoh \billyoh\n. a large amount; British say “it rained like billyo” where Americans say “it rained like the devil”. [British] Syn: billy-ho. [WordNet 1.5]