billyo n 1: an unimaginably large amount; "British say `it rained like billyo' where Americans say `it rained like all get out'" [syn: {billyo}, {billyoh}, {billy-ho}, {all get out}]
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]