Chapa is the Spanish version of "shawty" it pretty much means the same thing. Its "chaparrita" but shortened which in Spanish means short girl, kinda like a nickname for ur daughter or loved one. Chapa is a name for ur bottom bitch or even a sexy broad walking down the street. This term is commonly used among the Mexican-Americans, Whitexican-Americans, Blackxican-Americans and others that live around the brown people in the west and south side of Phoenix.

In Spanish gay slang, an instance of sexual intercourse, typically between a male prostitute (chapero) and his customer.

a generally overbearing friend who just won't leave you alone. even though you've tried very hard to get them to go by verbal and/or physical abuse.
see synonyms at "goosegog"