Largo al factotum ("Make way for the factotum") is an aria from The Barber of Seville by Gioachino Rossini, sung at the first entrance of the title character; the repeated "Figaro"s before the final patter section are an icon in popular culture of operatic singing. The term "factotum" refers to a general servant and comes from the Latin where it literally means "do everything."
Due to the constant singing of triplets in 6/8 meter at a presto tempo the piece is often noted as one of the most difficult baritone arias to perform. This, along with the tongue-twisting nature of some of the lines, insisting on Italian superlatives (always ending in '-issimo'), have made it a pièce de résistance in which a skilled baritone has the chance to highlight all of his qualities.
http://www.youtube.com/watch?v=Yf4c8uREO3U