FULANO A word used in replacement of any unkonown person. if a secon person is needed then is zutano. If a third, it is merengano.
Synonyms of fulano are zutano merengano
Used in US as well
"FULANO, ZUTANO Y MERENGANO are words used to name unknown persons. El fulano lo compró, zutano lo vendió y merengano se lo robó. Fulano bought it, zutano sold it, merengano robbed it."