"Moustache Pete" was a generic term to describe any old-fashioned, out-of-date Mafioso who clung to ancient traditions and, in effect, tried to replicate rural Sicilian Mafia practices in 20th Century America. The term derives from the vintage handlebar moustaches worn by these guys. However, the last of the "Moustache Petes"--Joe Masseria and Salvatore Maranzano, who were assassinated during and after the Castellemmarese War of 1930-31--were clean-shaven.