Tiny Rascals Gang is the largest Asian gang in the country. Two sets are known "The Grey Rags and the Blue Rag sets". This gang is known to have members in Connecticut, the Portland, Maine area, the Lowell (MA) and Brattleboro, VT) areas, as well as in the New Hampshire Prison System.
Mi'ijo is a contraction of Mi hijo--"my son"--is like "sonny" used in addressing younger boys. Affectionate use of mijo between friends and peers is a major Mexicanism. Mija (MEE hah) is used to address women, the same as mijo with males.
The word means "eggs," but the reference to "balls" is so strong that you have to watch out using the word at all. Polite girls would probably order blanquillos (little white things) from a male waiter.