An adolesence ranging from the ages of 13 to 18 who is very mature in what they do; a teen who's young on the outside and grown on the inside

A younger or not younger friend or family who is considered a “yungin” by helping the big bros out and are becoming a part of the life of the big homies

refers to a young homie, or one who wants to remain forever young.

A slang meaning someone smaller and weaker than you.