[shirt.tail] adj (1845) 1: very young: immature "~ boys fishing in the creek"
2: distantly and indefinitely related "a ~ cousin on her father's side"
3: small, trivial, or short typically to the point of inadequacy "has a gullied ~ ranch in the hills"
[2]shirttail n (1873) 1: the part of a shirt that reaches below the waist esp. in the back
2: something small or inadequate