Informal slang for "an upper class person". Now commonly used in place of the term "posh cunt" in situations where use of this term would be considered impolite or inadvisable.
"Have you seen Fred's flat lately? That newbird he's got is a right posho"
More than one Pocho or Mexican-American.
1. A group of people that have abandoned Mexico's culture and people.
2. Any Mexican who celebrates Cinco De Mayo in Mississippi.
Hey hector that Pocho called INS on me so I could get deported.